249664433 has 4 divisors (see below), whose sum is σ = 251460720. Its totient is φ = 247868148.

The previous prime is 249664409. The next prime is 249664439. The reversal of 249664433 is 334466942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249664433 - 2²² = 245470129 is a prime.

It is a super-2 number, since 2×249664433² = 124664658210422978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249664439) 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, 897935 + ... + 898212.

It is an arithmetic number, because the mean of its divisors is an integer number (62865180).

Almost surely, 2^249664433 is an apocalyptic number.

It is an amenable number.

249664433 is a deficient number, since it is larger than the sum of its proper divisors (1796287).

249664433 is a wasteful number, since it uses less digits than its factorization.

249664433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796286.

The product of its digits is 373248, while the sum is 41.

The square root of 249664433 is about 15800.7731772847. The cubic root of 249664433 is about 629.6785401254.

The spelling of 249664433 in words is "two hundred forty-nine million, six hundred sixty-four thousand, four hundred thirty-three".