38009726921 has 2 divisors, whose sum is σ = 38009726922. Its totient is φ = 38009726920.

The previous prime is 38009726899. The next prime is 38009726941. The reversal of 38009726921 is 12962790083.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36825610000 + 1184116921 = 191900^2 + 34411^2 .

It is a cyclic number.

It is not a de Polignac number, because 38009726921 - 2¹⁴ = 38009710537 is a prime.

It is not a weakly prime, because it can be changed into another prime (38009726941) 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, 19004863460 + 19004863461.

It is an arithmetic number, because the mean of its divisors is an integer number (19004863461).

Almost surely, 2^38009726921 is an apocalyptic number.

It is an amenable number.

38009726921 is a deficient number, since it is larger than the sum of its proper divisors (1).

38009726921 is an equidigital number, since it uses as much as digits as its factorization.

38009726921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 38009726921 in words is "thirty-eight billion, nine million, seven hundred twenty-six thousand, nine hundred twenty-one".