38992021 has 2 divisors, whose sum is σ = 38992022. Its totient is φ = 38992020.

The previous prime is 38992007. The next prime is 38992087. The reversal of 38992021 is 12029983.

38992021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38613796 + 378225 = 6214^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 38992021 - 2¹⁹ = 38467733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38992091) 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, 19496010 + 19496011.

It is an arithmetic number, because the mean of its divisors is an integer number (19496011).

Almost surely, 2^38992021 is an apocalyptic number.

It is an amenable number.

38992021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38992021 is an equidigital number, since it uses as much as digits as its factorization.

38992021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 38992021 is about 6244.3591344509. The cubic root of 38992021 is about 339.0980158214.

The spelling of 38992021 in words is "thirty-eight million, nine hundred ninety-two thousand, twenty-one".