7938385937 has 2 divisors, whose sum is σ = 7938385938. Its totient is φ = 7938385936.

The previous prime is 7938385919. The next prime is 7938385957. The reversal of 7938385937 is 7395838397.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7687607041 + 250778896 = 87679^2 + 15836^2 .

It is a cyclic number.

It is not a de Polignac number, because 7938385937 - 2²² = 7934191633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7938385937.

It is not a weakly prime, because it can be changed into another prime (7938385957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3969192968 + 3969192969.

It is an arithmetic number, because the mean of its divisors is an integer number (3969192969).

Almost surely, 2^7938385937 is an apocalyptic number.

It is an amenable number.

7938385937 is a deficient number, since it is larger than the sum of its proper divisors (1).

7938385937 is an equidigital number, since it uses as much as digits as its factorization.

7938385937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34292160, while the sum is 62.

The square root of 7938385937 is about 89097.6202656390. The cubic root of 7938385937 is about 1994.8522564860.

The spelling of 7938385937 in words is "seven billion, nine hundred thirty-eight million, three hundred eighty-five thousand, nine hundred thirty-seven".