38877961 has 2 divisors, whose sum is σ = 38877962. Its totient is φ = 38877960.

The previous prime is 38877941. The next prime is 38877983. The reversal of 38877961 is 16977883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35473936 + 3404025 = 5956^2 + 1845^2 .

It is a cyclic number.

It is not a de Polignac number, because 38877961 - 2⁷ = 38877833 is a prime.

It is a super-2 number, since 2×38877961² = 3022991703035042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38877901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19438980 + 19438981.

It is an arithmetic number, because the mean of its divisors is an integer number (19438981).

Almost surely, 2^38877961 is an apocalyptic number.

It is an amenable number.

38877961 is a deficient number, since it is larger than the sum of its proper divisors (1).

38877961 is an equidigital number, since it uses as much as digits as its factorization.

38877961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 38877961 is about 6235.2194027155. The cubic root of 38877961 is about 338.7670481564.

The spelling of 38877961 in words is "thirty-eight million, eight hundred seventy-seven thousand, nine hundred sixty-one".