249391296313 has 8 divisors (see below), whose sum is σ = 249825529800. Its totient is φ = 248957349888.

The previous prime is 249391296307. The next prime is 249391296367. The reversal of 249391296313 is 313692193942.

It can be written as a sum of positive squares in 4 ways, for example, as 91779914304 + 157611382009 = 302952^2 + 397003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249391296313 - 2²⁵ = 249357741881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249391296383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705395 + ... + 1845847.

It is an arithmetic number, because the mean of its divisors is an integer number (31228191225).

Almost surely, 2^249391296313 is an apocalyptic number.

It is an amenable number.

249391296313 is a deficient number, since it is larger than the sum of its proper divisors (434233487).

249391296313 is a wasteful number, since it uses less digits than its factorization.

249391296313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143531.

The product of its digits is 1889568, while the sum is 52.

The spelling of 249391296313 in words is "two hundred forty-nine billion, three hundred ninety-one million, two hundred ninety-six thousand, three hundred thirteen".