249710431 has 2 divisors, whose sum is σ = 249710432. Its totient is φ = 249710430.

The previous prime is 249710429. The next prime is 249710477. The reversal of 249710431 is 134017942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249710431 - 2¹ = 249710429 is a prime.

It is a super-2 number, since 2×249710431² = 124710598700411522, which contains 22 as substring.

Together with 249710429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 249710393 and 249710402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249716431) 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 as a sum of consecutive naturals, namely, 124855215 + 124855216.

It is an arithmetic number, because the mean of its divisors is an integer number (124855216).

Almost surely, 2^249710431 is an apocalyptic number.

249710431 is a deficient number, since it is larger than the sum of its proper divisors (1).

249710431 is an equidigital number, since it uses as much as digits as its factorization.

249710431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 249710431 is about 15802.2286719311. The cubic root of 249710431 is about 629.7172082616.

The spelling of 249710431 in words is "two hundred forty-nine million, seven hundred ten thousand, four hundred thirty-one".