249488931 has 4 divisors (see below), whose sum is σ = 332651912. Its totient is φ = 166325952.

The previous prime is 249488929. The next prime is 249488951. The reversal of 249488931 is 139884942.

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

It is not a de Polignac number, because 249488931 - 2¹ = 249488929 is a prime.

It is a super-2 number, since 2×249488931² = 124489453383045522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249488951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41581486 + ... + 41581491.

It is an arithmetic number, because the mean of its divisors is an integer number (83162978).

Almost surely, 2^249488931 is an apocalyptic number.

249488931 is a deficient number, since it is larger than the sum of its proper divisors (83162981).

249488931 is an equidigital number, since it uses as much as digits as its factorization.

249488931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83162980.

The product of its digits is 497664, while the sum is 48.

The square root of 249488931 is about 15795.2186119724. The cubic root of 249488931 is about 629.5309610379.

The spelling of 249488931 in words is "two hundred forty-nine million, four hundred eighty-eight thousand, nine hundred thirty-one".