39907157 has 2 divisors, whose sum is σ = 39907158. Its totient is φ = 39907156.

The previous prime is 39907151. The next prime is 39907159. The reversal of 39907157 is 75170993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27133681 + 12773476 = 5209^2 + 3574^2 .

It is a cyclic number.

It is not a de Polignac number, because 39907157 - 2¹⁰ = 39906133 is a prime.

Together with 39907159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39907151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19953578 + 19953579.

It is an arithmetic number, because the mean of its divisors is an integer number (19953579).

Almost surely, 2^39907157 is an apocalyptic number.

It is an amenable number.

39907157 is a deficient number, since it is larger than the sum of its proper divisors (1).

39907157 is an equidigital number, since it uses as much as digits as its factorization.

39907157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 39907157 is about 6317.2111726616. The cubic root of 39907157 is about 341.7303855250.

The spelling of 39907157 in words is "thirty-nine million, nine hundred seven thousand, one hundred fifty-seven".