249072939 has 6 divisors (see below), whose sum is σ = 359772036. Its totient is φ = 166048620.

The previous prime is 249072913. The next prime is 249072959. The reversal of 249072939 is 939270942.

249072939 is a `hidden beast` number, since 2 + 490 + 72 + 93 + 9 = 666.

It is not a de Polignac number, because 249072939 - 2¹¹ = 249070891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249072894 and 249072903.

It is not an unprimeable number, because it can be changed into a prime (249072959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13837377 + ... + 13837394.

It is an arithmetic number, because the mean of its divisors is an integer number (59962006).

Almost surely, 2^249072939 is an apocalyptic number.

249072939 is a deficient number, since it is larger than the sum of its proper divisors (110699097).

249072939 is a wasteful number, since it uses less digits than its factorization.

249072939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27674777 (or 27674774 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 249072939 is about 15782.0448294890. The cubic root of 249072939 is about 629.1808779992.

The spelling of 249072939 in words is "two hundred forty-nine million, seventy-two thousand, nine hundred thirty-nine".