249410731 has 2 divisors, whose sum is σ = 249410732. Its totient is φ = 249410730.

The previous prime is 249410729. The next prime is 249410741. The reversal of 249410731 is 137014942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249410731 - 2¹ = 249410729 is a prime.

It is a super-2 number, since 2×249410731² = 124411425475908722, which contains 22 as substring.

Together with 249410729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 249410693 and 249410702.

It is not a weakly prime, because it can be changed into another prime (249410741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124705365 + 124705366.

It is an arithmetic number, because the mean of its divisors is an integer number (124705366).

Almost surely, 2^249410731 is an apocalyptic number.

249410731 is a deficient number, since it is larger than the sum of its proper divisors (1).

249410731 is an equidigital number, since it uses as much as digits as its factorization.

249410731 is an evil number, because the sum of its binary digits is even.

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

The square root of 249410731 is about 15792.7429853082. The cubic root of 249410731 is about 629.4651806105.

It can be divided in two parts, 2494 and 10731, that added together give a square (13225 = 115²).

The spelling of 249410731 in words is "two hundred forty-nine million, four hundred ten thousand, seven hundred thirty-one".