38993771 has 2 divisors, whose sum is σ = 38993772. Its totient is φ = 38993770.

The previous prime is 38993761. The next prime is 38993797. The reversal of 38993771 is 17739983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38993771 - 2⁶ = 38993707 is a prime.

It is not a weakly prime, because it can be changed into another prime (38993741) 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, 19496885 + 19496886.

It is an arithmetic number, because the mean of its divisors is an integer number (19496886).

Almost surely, 2^38993771 is an apocalyptic number.

38993771 is a deficient number, since it is larger than the sum of its proper divisors (1).

38993771 is an equidigital number, since it uses as much as digits as its factorization.

38993771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 38993771 is about 6244.4992593482. The cubic root of 38993771 is about 339.1030887623.

The spelling of 38993771 in words is "thirty-eight million, nine hundred ninety-three thousand, seven hundred seventy-one".