1249864613 has 2 divisors, whose sum is σ = 1249864614. Its totient is φ = 1249864612.

The previous prime is 1249864571. The next prime is 1249864621. The reversal of 1249864613 is 3164689421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1045746244 + 204118369 = 32338^2 + 14287^2 .

It is an emirp because it is prime and its reverse (3164689421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249864613 - 2¹² = 1249860517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249866613) 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, 624932306 + 624932307.

It is an arithmetic number, because the mean of its divisors is an integer number (624932307).

Almost surely, 2^1249864613 is an apocalyptic number.

It is an amenable number.

1249864613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249864613 is an equidigital number, since it uses as much as digits as its factorization.

1249864613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 1249864613 is about 35353.4243461648. The cubic root of 1249864613 is about 1077.1784526185.

The spelling of 1249864613 in words is "one billion, two hundred forty-nine million, eight hundred sixty-four thousand, six hundred thirteen".