249475704979 has 2 divisors, whose sum is σ = 249475704980. Its totient is φ = 249475704978.

The previous prime is 249475704971. The next prime is 249475705019. The reversal of 249475704979 is 979407574942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249475704979 - 2³ = 249475704971 is a prime.

It is not a weakly prime, because it can be changed into another prime (249475704971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124737852489 + 124737852490.

It is an arithmetic number, because the mean of its divisors is an integer number (124737852490).

Almost surely, 2^249475704979 is an apocalyptic number.

249475704979 is a deficient number, since it is larger than the sum of its proper divisors (1).

249475704979 is an equidigital number, since it uses as much as digits as its factorization.

249475704979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160030080, while the sum is 67.

The spelling of 249475704979 in words is "two hundred forty-nine billion, four hundred seventy-five million, seven hundred four thousand, nine hundred seventy-nine".