249263879 has 2 divisors, whose sum is σ = 249263880. Its totient is φ = 249263878.

The previous prime is 249263837. The next prime is 249263893. The reversal of 249263879 is 978362942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249263879 - 2¹⁶ = 249198343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249263779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124631939 + 124631940.

It is an arithmetic number, because the mean of its divisors is an integer number (124631940).

Almost surely, 2^249263879 is an apocalyptic number.

249263879 is a deficient number, since it is larger than the sum of its proper divisors (1).

249263879 is an equidigital number, since it uses as much as digits as its factorization.

249263879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 249263879 is about 15788.0929500684. The cubic root of 249263879 is about 629.3416141963.

The spelling of 249263879 in words is "two hundred forty-nine million, two hundred sixty-three thousand, eight hundred seventy-nine".