387885961 has 4 divisors (see below), whose sum is σ = 404750592. Its totient is φ = 371021332.

The previous prime is 387885917. The next prime is 387885973. The reversal of 387885961 is 169588783.

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 387885961 - 2²⁵ = 354331529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387885061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8432281 + ... + 8432326.

It is an arithmetic number, because the mean of its divisors is an integer number (101187648).

Almost surely, 2^387885961 is an apocalyptic number.

It is an amenable number.

387885961 is a deficient number, since it is larger than the sum of its proper divisors (16864631).

387885961 is a wasteful number, since it uses less digits than its factorization.

387885961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16864630.

The product of its digits is 2903040, while the sum is 55.

The square root of 387885961 is about 19694.8206643270. The cubic root of 387885961 is about 729.2918390491.

The spelling of 387885961 in words is "three hundred eighty-seven million, eight hundred eighty-five thousand, nine hundred sixty-one".