387372921 has 8 divisors (see below), whose sum is σ = 556227840. Its totient is φ = 238383312.

The previous prime is 387372917. The next prime is 387372929. The reversal of 387372921 is 129273783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387372921 - 2² = 387372917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387372929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4966281 + ... + 4966358.

It is an arithmetic number, because the mean of its divisors is an integer number (69528480).

Almost surely, 2^387372921 is an apocalyptic number.

It is an amenable number.

387372921 is a deficient number, since it is larger than the sum of its proper divisors (168854919).

387372921 is a wasteful number, since it uses less digits than its factorization.

387372921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9932655.

The product of its digits is 127008, while the sum is 42.

The square root of 387372921 is about 19681.7916105216. The cubic root of 387372921 is about 728.9701629175.

The spelling of 387372921 in words is "three hundred eighty-seven million, three hundred seventy-two thousand, nine hundred twenty-one".