38977961 has 4 divisors (see below), whose sum is σ = 42521424. Its totient is φ = 35434500.

The previous prime is 38977933. The next prime is 38977997. The reversal of 38977961 is 16977983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38977961 - 2²² = 34783657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38977901) 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 in 3 ways as a sum of consecutive naturals, for example, 1771715 + ... + 1771736.

It is an arithmetic number, because the mean of its divisors is an integer number (10630356).

Almost surely, 2^38977961 is an apocalyptic number.

It is an amenable number.

38977961 is a deficient number, since it is larger than the sum of its proper divisors (3543463).

38977961 is a wasteful number, since it uses less digits than its factorization.

38977961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543462.

The product of its digits is 571536, while the sum is 50.

The square root of 38977961 is about 6243.2332168517. The cubic root of 38977961 is about 339.0572528554.

The spelling of 38977961 in words is "thirty-eight million, nine hundred seventy-seven thousand, nine hundred sixty-one".