642907948 has 6 divisors (see below), whose sum is σ = 1125088916. Its totient is φ = 321453972.

The previous prime is 642907939. The next prime is 642907981. The reversal of 642907948 is 849709246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80363490 + ... + 80363497.

Almost surely, 2^642907948 is an apocalyptic number.

It is an amenable number.

642907948 is a deficient number, since it is larger than the sum of its proper divisors (482180968).

642907948 is a wasteful number, since it uses less digits than its factorization.

642907948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160726991 (or 160726989 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 642907948 is about 25355.6295129898. The cubic root of 642907948 is about 863.0771091913.

The spelling of 642907948 in words is "six hundred forty-two million, nine hundred seven thousand, nine hundred forty-eight".