39792921 has 16 divisors (see below), whose sum is σ = 63273984. Its totient is φ = 21749904.

The previous prime is 39792887. The next prime is 39792943. The reversal of 39792921 is 12929793.

It is a happy number.

39792921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39792921 - 2⁷ = 39792793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39792421) 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 15 ways as a sum of consecutive naturals, for example, 40711 + ... + 41676.

It is an arithmetic number, because the mean of its divisors is an integer number (3954624).

Almost surely, 2^39792921 is an apocalyptic number.

It is an amenable number.

39792921 is a deficient number, since it is larger than the sum of its proper divisors (23481063).

39792921 is a wasteful number, since it uses less digits than its factorization.

39792921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82420.

The product of its digits is 61236, while the sum is 42.

The square root of 39792921 is about 6308.1630448174. The cubic root of 39792921 is about 341.4040011213.

The spelling of 39792921 in words is "thirty-nine million, seven hundred ninety-two thousand, nine hundred twenty-one".