249679291 has 2 divisors, whose sum is σ = 249679292. Its totient is φ = 249679290.

The previous prime is 249679277. The next prime is 249679321. The reversal of 249679291 is 192976942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249679291 - 2⁵ = 249679259 is a prime.

It is not a weakly prime, because it can be changed into another prime (249679201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124839645 + 124839646.

It is an arithmetic number, because the mean of its divisors is an integer number (124839646).

Almost surely, 2^249679291 is an apocalyptic number.

249679291 is a deficient number, since it is larger than the sum of its proper divisors (1).

249679291 is an equidigital number, since it uses as much as digits as its factorization.

249679291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 249679291 is about 15801.2433371555. The cubic root of 249679291 is about 629.6910309957.

The spelling of 249679291 in words is "two hundred forty-nine million, six hundred seventy-nine thousand, two hundred ninety-one".