249679379 has 2 divisors, whose sum is σ = 249679380. Its totient is φ = 249679378.

The previous prime is 249679321. The next prime is 249679393. The reversal of 249679379 is 973976942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249679379 - 2¹⁶ = 249613843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (249679679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124839689 + 124839690.

It is an arithmetic number, because the mean of its divisors is an integer number (124839690).

Almost surely, 2^249679379 is an apocalyptic number.

249679379 is a deficient number, since it is larger than the sum of its proper divisors (1).

249679379 is an equidigital number, since it uses as much as digits as its factorization.

249679379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 56.

The square root of 249679379 is about 15801.2461217462. The cubic root of 249679379 is about 629.6911049744.

The spelling of 249679379 in words is "two hundred forty-nine million, six hundred seventy-nine thousand, three hundred seventy-nine".