39513997 has 2 divisors, whose sum is σ = 39513998. Its totient is φ = 39513996.

The previous prime is 39513961. The next prime is 39514003. The reversal of 39513997 is 79931593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28879876 + 10634121 = 5374^2 + 3261^2 .

It is a cyclic number.

It is not a de Polignac number, because 39513997 - 2²³ = 31125389 is a prime.

It is a super-2 number, since 2×39513997² = 3122711917832018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39513937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19756998 + 19756999.

It is an arithmetic number, because the mean of its divisors is an integer number (19756999).

Almost surely, 2^39513997 is an apocalyptic number.

It is an amenable number.

39513997 is a deficient number, since it is larger than the sum of its proper divisors (1).

39513997 is an equidigital number, since it uses as much as digits as its factorization.

39513997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229635, while the sum is 46.

The square root of 39513997 is about 6286.0159878893. The cubic root of 39513997 is about 340.6044524485.

The spelling of 39513997 in words is "thirty-nine million, five hundred thirteen thousand, nine hundred ninety-seven".