38987961 has 4 divisors (see below), whose sum is σ = 51983952. Its totient is φ = 25991972.

The previous prime is 38987951. The next prime is 38987969. The reversal of 38987961 is 16978983.

38987961 is nontrivially palindromic in base 14.

38987961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38987961 - 2⁵ = 38987929 is a prime.

It is a super-2 number, since 2×38987961² = 3040122205875042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38987969) 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 in 3 ways as a sum of consecutive naturals, for example, 6497991 + ... + 6497996.

It is an arithmetic number, because the mean of its divisors is an integer number (12995988).

Almost surely, 2^38987961 is an apocalyptic number.

It is an amenable number.

38987961 is a deficient number, since it is larger than the sum of its proper divisors (12995991).

38987961 is a wasteful number, since it uses less digits than its factorization.

38987961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12995990.

The product of its digits is 653184, while the sum is 51.

The square root of 38987961 is about 6244.0340325786. The cubic root of 38987961 is about 339.0862460140.

The spelling of 38987961 in words is "thirty-eight million, nine hundred eighty-seven thousand, nine hundred sixty-one".