249606431 has 2 divisors, whose sum is σ = 249606432. Its totient is φ = 249606430.

The previous prime is 249606397. The next prime is 249606437. The reversal of 249606431 is 134606942.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249606431 is a prime.

It is a super-2 number, since 2×249606431² = 124606740793115522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 249606391 and 249606400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249606437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124803215 + 124803216.

It is an arithmetic number, because the mean of its divisors is an integer number (124803216).

Almost surely, 2^249606431 is an apocalyptic number.

249606431 is a deficient number, since it is larger than the sum of its proper divisors (1).

249606431 is an equidigital number, since it uses as much as digits as its factorization.

249606431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 249606431 is about 15798.9376541589. The cubic root of 249606431 is about 629.6297740772.

The spelling of 249606431 in words is "two hundred forty-nine million, six hundred six thousand, four hundred thirty-one".