39173861137 has 2 divisors, whose sum is σ = 39173861138. Its totient is φ = 39173861136.

The previous prime is 39173861033. The next prime is 39173861159. The reversal of 39173861137 is 73116837193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38525445841 + 648415296 = 196279^2 + 25464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39173861137 is a prime.

It is not a weakly prime, because it can be changed into another prime (39173861737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19586930568 + 19586930569.

It is an arithmetic number, because the mean of its divisors is an integer number (19586930569).

Almost surely, 2^39173861137 is an apocalyptic number.

It is an amenable number.

39173861137 is a deficient number, since it is larger than the sum of its proper divisors (1).

39173861137 is an equidigital number, since it uses as much as digits as its factorization.

39173861137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The spelling of 39173861137 in words is "thirty-nine billion, one hundred seventy-three million, eight hundred sixty-one thousand, one hundred thirty-seven".