249070979 has 4 divisors (see below), whose sum is σ = 259900176. Its totient is φ = 238241784.

The previous prime is 249070973. The next prime is 249070993. The reversal of 249070979 is 979070942.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249070979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249070973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5414564 + ... + 5414609.

It is an arithmetic number, because the mean of its divisors is an integer number (64975044).

Almost surely, 2^249070979 is an apocalyptic number.

249070979 is a deficient number, since it is larger than the sum of its proper divisors (10829197).

249070979 is a wasteful number, since it uses less digits than its factorization.

249070979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10829196.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 249070979 is about 15781.9827334844. The cubic root of 249070979 is about 629.1792276155.

The spelling of 249070979 in words is "two hundred forty-nine million, seventy thousand, nine hundred seventy-nine".