39129157 has 2 divisors, whose sum is σ = 39129158. Its totient is φ = 39129156.

The previous prime is 39129137. The next prime is 39129191. The reversal of 39129157 is 75192193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39112516 + 16641 = 6254^2 + 129^2 .

It is an emirp because it is prime and its reverse (75192193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39129157 - 2⁷ = 39129029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39129107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19564578 + 19564579.

It is an arithmetic number, because the mean of its divisors is an integer number (19564579).

Almost surely, 2^39129157 is an apocalyptic number.

It is an amenable number.

39129157 is a deficient number, since it is larger than the sum of its proper divisors (1).

39129157 is an equidigital number, since it uses as much as digits as its factorization.

39129157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 37.

The square root of 39129157 is about 6255.3302870432. The cubic root of 39129157 is about 339.4950896643.

The spelling of 39129157 in words is "thirty-nine million, one hundred twenty-nine thousand, one hundred fifty-seven".