249309609013 has 2 divisors, whose sum is σ = 249309609014. Its totient is φ = 249309609012.

The previous prime is 249309608993. The next prime is 249309609067. The reversal of 249309609013 is 310906903942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240734478609 + 8575130404 = 490647^2 + 92602^2 .

It is a cyclic number.

It is not a de Polignac number, because 249309609013 - 2²⁹ = 248772738101 is a prime.

It is a super-2 number, since 2×249309609013² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249309609113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124654804506 + 124654804507.

It is an arithmetic number, because the mean of its divisors is an integer number (124654804507).

Almost surely, 2^249309609013 is an apocalyptic number.

It is an amenable number.

249309609013 is a deficient number, since it is larger than the sum of its proper divisors (1).

249309609013 is an equidigital number, since it uses as much as digits as its factorization.

249309609013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 249309609013 in words is "two hundred forty-nine billion, three hundred nine million, six hundred nine thousand, thirteen".