39112921 has 2 divisors, whose sum is σ = 39112922. Its totient is φ = 39112920.

The previous prime is 39112901. The next prime is 39112933. The reversal of 39112921 is 12921193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39000025 + 112896 = 6245^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 39112921 - 2²⁵ = 5558489 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39112921.

It is not a weakly prime, because it can be changed into another prime (39112901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19556460 + 19556461.

It is an arithmetic number, because the mean of its divisors is an integer number (19556461).

Almost surely, 2^39112921 is an apocalyptic number.

It is an amenable number.

39112921 is a deficient number, since it is larger than the sum of its proper divisors (1).

39112921 is an equidigital number, since it uses as much as digits as its factorization.

39112921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 28.

The square root of 39112921 is about 6254.0323791934. The cubic root of 39112921 is about 339.4481272008.

The spelling of 39112921 in words is "thirty-nine million, one hundred twelve thousand, nine hundred twenty-one".