38885731979 has 2 divisors, whose sum is σ = 38885731980. Its totient is φ = 38885731978.

The previous prime is 38885731957. The next prime is 38885732009. The reversal of 38885731979 is 97913758883.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38885731979 is a prime.

It is not a weakly prime, because it can be changed into another prime (38885731909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19442865989 + 19442865990.

It is an arithmetic number, because the mean of its divisors is an integer number (19442865990).

Almost surely, 2^38885731979 is an apocalyptic number.

38885731979 is a deficient number, since it is larger than the sum of its proper divisors (1).

38885731979 is an equidigital number, since it uses as much as digits as its factorization.

38885731979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 68.

The spelling of 38885731979 in words is "thirty-eight billion, eight hundred eighty-five million, seven hundred thirty-one thousand, nine hundred seventy-nine".