38972881 has 2 divisors, whose sum is σ = 38972882. Its totient is φ = 38972880.

The previous prime is 38972867. The next prime is 38972903. The reversal of 38972881 is 18827983.

38972881 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., 38241856 + 731025 = 6184^2 + 855^2 .

It is an emirp because it is prime and its reverse (18827983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38972881 - 2⁷ = 38972753 is a prime.

It is a super-2 number, since 2×38972881² = 3037770906880322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38972821) 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, 19486440 + 19486441.

It is an arithmetic number, because the mean of its divisors is an integer number (19486441).

Almost surely, 2^38972881 is an apocalyptic number.

It is an amenable number.

38972881 is a deficient number, since it is larger than the sum of its proper divisors (1).

38972881 is an equidigital number, since it uses as much as digits as its factorization.

38972881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 38972881 is about 6242.8263631147. The cubic root of 38972881 is about 339.0425224314.

The spelling of 38972881 in words is "thirty-eight million, nine hundred seventy-two thousand, eight hundred eighty-one".