38604289921 has 2 divisors, whose sum is σ = 38604289922. Its totient is φ = 38604289920.

The previous prime is 38604289883. The next prime is 38604289939. The reversal of 38604289921 is 12998240683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29892681025 + 8711608896 = 172895^2 + 93336^2 .

It is a cyclic number.

It is not a de Polignac number, because 38604289921 - 2³¹ = 36456806273 is a prime.

It is not a weakly prime, because it can be changed into another prime (38604289121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19302144960 + 19302144961.

It is an arithmetic number, because the mean of its divisors is an integer number (19302144961).

Almost surely, 2^38604289921 is an apocalyptic number.

It is an amenable number.

38604289921 is a deficient number, since it is larger than the sum of its proper divisors (1).

38604289921 is an equidigital number, since it uses as much as digits as its factorization.

38604289921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 38604289921 in words is "thirty-eight billion, six hundred four million, two hundred eighty-nine thousand, nine hundred twenty-one".