38699775869 has 2 divisors, whose sum is σ = 38699775870. Its totient is φ = 38699775868.

The previous prime is 38699775859. The next prime is 38699775923. The reversal of 38699775869 is 96857799683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32574835225 + 6124940644 = 180485^2 + 78262^2 .

It is a cyclic number.

It is not a de Polignac number, because 38699775869 - 2⁴ = 38699775853 is a prime.

It is a super-2 number, since 2×38699775869² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38699775869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38699775859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19349887934 + 19349887935.

It is an arithmetic number, because the mean of its divisors is an integer number (19349887935).

Almost surely, 2^38699775869 is an apocalyptic number.

It is an amenable number.

38699775869 is a deficient number, since it is larger than the sum of its proper divisors (1).

38699775869 is an equidigital number, since it uses as much as digits as its factorization.

38699775869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1234517760, while the sum is 77.

The spelling of 38699775869 in words is "thirty-eight billion, six hundred ninety-nine million, seven hundred seventy-five thousand, eight hundred sixty-nine".