38993663 has 2 divisors, whose sum is σ = 38993664. Its totient is φ = 38993662.

The previous prime is 38993653. The next prime is 38993687. The reversal of 38993663 is 36639983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38993663 - 2⁶ = 38993599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38993623) 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, 19496831 + 19496832.

It is an arithmetic number, because the mean of its divisors is an integer number (19496832).

Almost surely, 2^38993663 is an apocalyptic number.

38993663 is a deficient number, since it is larger than the sum of its proper divisors (1).

38993663 is an equidigital number, since it uses as much as digits as its factorization.

38993663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 47.

The square root of 38993663 is about 6244.4906117313. The cubic root of 38993663 is about 339.1027756937.

The spelling of 38993663 in words is "thirty-eight million, nine hundred ninety-three thousand, six hundred sixty-three".