7999012613 has 2 divisors, whose sum is σ = 7999012614. Its totient is φ = 7999012612.

The previous prime is 7999012603. The next prime is 7999012687. The reversal of 7999012613 is 3162109997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4091137444 + 3907875169 = 63962^2 + 62513^2 .

It is an emirp because it is prime and its reverse (3162109997) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7999012613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7999012603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999506306 + 3999506307.

It is an arithmetic number, because the mean of its divisors is an integer number (3999506307).

Almost surely, 2^7999012613 is an apocalyptic number.

It is an amenable number.

7999012613 is a deficient number, since it is larger than the sum of its proper divisors (1).

7999012613 is an equidigital number, since it uses as much as digits as its factorization.

7999012613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 7999012613 is about 89437.1992685370. The cubic root of 7999012613 is about 1999.9177143646.

The spelling of 7999012613 in words is "seven billion, nine hundred ninety-nine million, twelve thousand, six hundred thirteen".