39136897 has 2 divisors, whose sum is σ = 39136898. Its totient is φ = 39136896.

The previous prime is 39136891. The next prime is 39136931. The reversal of 39136897 is 79863193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36675136 + 2461761 = 6056^2 + 1569^2 .

It is an emirp because it is prime and its reverse (79863193) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39136897 is a prime.

It is not a weakly prime, because it can be changed into another prime (39136891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19568448 + 19568449.

It is an arithmetic number, because the mean of its divisors is an integer number (19568449).

Almost surely, 2^39136897 is an apocalyptic number.

It is an amenable number.

39136897 is a deficient number, since it is larger than the sum of its proper divisors (1).

39136897 is an equidigital number, since it uses as much as digits as its factorization.

39136897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 39136897 is about 6255.9489288197. The cubic root of 39136897 is about 339.5174729624.

The spelling of 39136897 in words is "thirty-nine million, one hundred thirty-six thousand, eight hundred ninety-seven".