249260831 has 2 divisors, whose sum is σ = 249260832. Its totient is φ = 249260830.

The previous prime is 249260827. The next prime is 249260911. The reversal of 249260831 is 138062942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249260831 - 2² = 249260827 is a prime.

It is a super-2 number, since 2×249260831² = 124261923741621122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249260791 and 249260800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249260731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124630415 + 124630416.

It is an arithmetic number, because the mean of its divisors is an integer number (124630416).

Almost surely, 2^249260831 is an apocalyptic number.

249260831 is a deficient number, since it is larger than the sum of its proper divisors (1).

249260831 is an equidigital number, since it uses as much as digits as its factorization.

249260831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 249260831 is about 15787.9964213323. The cubic root of 249260831 is about 629.3390489884.

The spelling of 249260831 in words is "two hundred forty-nine million, two hundred sixty thousand, eight hundred thirty-one".