9945402613 has 2 divisors, whose sum is σ = 9945402614. Its totient is φ = 9945402612.

The previous prime is 9945402589. The next prime is 9945402631. The reversal of 9945402613 is 3162045499.

9945402613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (9945402631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6317388324 + 3628014289 = 79482^2 + 60233^2 .

It is an emirp because it is prime and its reverse (3162045499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9945402613 - 2¹³ = 9945394421 is a prime.

It is a super-2 number, since 2×9945402613² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9945402613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9945402413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972701306 + 4972701307.

It is an arithmetic number, because the mean of its divisors is an integer number (4972701307).

Almost surely, 2^9945402613 is an apocalyptic number.

It is an amenable number.

9945402613 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945402613 is an equidigital number, since it uses as much as digits as its factorization.

9945402613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 9945402613 is about 99726.6394350075. The cubic root of 9945402613 is about 2150.5066491579.

The spelling of 9945402613 in words is "nine billion, nine hundred forty-five million, four hundred two thousand, six hundred thirteen".