249746965 has 16 divisors (see below), whose sum is σ = 324818928. Its totient is φ = 183246336.

The previous prime is 249746953. The next prime is 249747011. The reversal of 249746965 is 569647942.

It can be written as a sum of positive squares in 8 ways, for example, as 11785489 + 237961476 = 3433^2 + 15426^2 .

It is not a de Polignac number, because 249746965 - 2⁵ = 249746933 is a prime.

It is a super-2 number, since 2×249746965² = 124747093053422450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2032 + ... + 22441.

It is an arithmetic number, because the mean of its divisors is an integer number (20301183).

Almost surely, 2^249746965 is an apocalyptic number.

It is an amenable number.

249746965 is a deficient number, since it is larger than the sum of its proper divisors (75071963).

249746965 is a wasteful number, since it uses less digits than its factorization.

249746965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24648.

The product of its digits is 3265920, while the sum is 52.

The square root of 249746965 is about 15803.3846058368. The cubic root of 249746965 is about 629.7479171198.

The spelling of 249746965 in words is "two hundred forty-nine million, seven hundred forty-six thousand, nine hundred sixty-five".