249470513279 has 4 divisors (see below), whose sum is σ = 268660552776. Its totient is φ = 230280473784.

The previous prime is 249470513273. The next prime is 249470513293. The reversal of 249470513279 is 972315074942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 249470513279 - 2²⁸ = 249202077823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249470513279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249470513273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9595019729 + ... + 9595019754.

It is an arithmetic number, because the mean of its divisors is an integer number (67165138194).

Almost surely, 2^249470513279 is an apocalyptic number.

249470513279 is a deficient number, since it is larger than the sum of its proper divisors (19190039497).

249470513279 is a wasteful number, since it uses less digits than its factorization.

249470513279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19190039496.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 249470513279 in words is "two hundred forty-nine billion, four hundred seventy million, five hundred thirteen thousand, two hundred seventy-nine".