924139857 has 4 divisors (see below), whose sum is σ = 1232186480. Its totient is φ = 616093236.

The previous prime is 924139849. The next prime is 924139871. The reversal of 924139857 is 758931429.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 924139857 - 2³ = 924139849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (924139457) 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, 154023307 + ... + 154023312.

It is an arithmetic number, because the mean of its divisors is an integer number (308046620).

Almost surely, 2^924139857 is an apocalyptic number.

It is an amenable number.

924139857 is a deficient number, since it is larger than the sum of its proper divisors (308046623).

924139857 is a wasteful number, since it uses less digits than its factorization.

924139857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308046622.

The product of its digits is 544320, while the sum is 48.

The square root of 924139857 is about 30399.6686988526. The cubic root of 924139857 is about 974.0454763470.

The spelling of 924139857 in words is "nine hundred twenty-four million, one hundred thirty-nine thousand, eight hundred fifty-seven".