249372979 has 4 divisors (see below), whose sum is σ = 249422760. Its totient is φ = 249323200.

The previous prime is 249372971. The next prime is 249372989. The reversal of 249372979 is 979273942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 249372979 - 2³ = 249372971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249372971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16414 + ... + 27715.

It is an arithmetic number, because the mean of its divisors is an integer number (62355690).

Almost surely, 2^249372979 is an apocalyptic number.

249372979 is a deficient number, since it is larger than the sum of its proper divisors (49781).

249372979 is an equidigital number, since it uses as much as digits as its factorization.

249372979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49780.

The product of its digits is 1714608, while the sum is 52.

The square root of 249372979 is about 15791.5477075555. The cubic root of 249372979 is about 629.4334193888.

The spelling of 249372979 in words is "two hundred forty-nine million, three hundred seventy-two thousand, nine hundred seventy-nine".