39907640189 has 2 divisors, whose sum is σ = 39907640190. Its totient is φ = 39907640188.

The previous prime is 39907640119. The next prime is 39907640191. The reversal of 39907640189 is 98104670993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23360676964 + 16546963225 = 152842^2 + 128635^2 .

It is a cyclic number.

It is not a de Polignac number, because 39907640189 - 2²⁸ = 39639204733 is a prime.

Together with 39907640191, 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 (39907640119) 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, 19953820094 + 19953820095.

It is an arithmetic number, because the mean of its divisors is an integer number (19953820095).

Almost surely, 2^39907640189 is an apocalyptic number.

It is an amenable number.

39907640189 is a deficient number, since it is larger than the sum of its proper divisors (1).

39907640189 is an equidigital number, since it uses as much as digits as its factorization.

39907640189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 39907640189 in words is "thirty-nine billion, nine hundred seven million, six hundred forty thousand, one hundred eighty-nine".