39120997 has 2 divisors, whose sum is σ = 39120998. Its totient is φ = 39120996.

The previous prime is 39120989. The next prime is 39121007. The reversal of 39120997 is 79902193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26204161 + 12916836 = 5119^2 + 3594^2 .

It is a cyclic number.

It is not a de Polignac number, because 39120997 - 2³ = 39120989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39120097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19560498 + 19560499.

It is an arithmetic number, because the mean of its divisors is an integer number (19560499).

Almost surely, 2^39120997 is an apocalyptic number.

It is an amenable number.

39120997 is a deficient number, since it is larger than the sum of its proper divisors (1).

39120997 is an equidigital number, since it uses as much as digits as its factorization.

39120997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 39120997 is about 6254.6780092983. The cubic root of 39120997 is about 339.4714885721.

The spelling of 39120997 in words is "thirty-nine million, one hundred twenty thousand, nine hundred ninety-seven".