379918521 has 6 divisors (see below), whose sum is σ = 548771210. Its totient is φ = 253279008.

The previous prime is 379918507. The next prime is 379918529. The reversal of 379918521 is 125819973.

379918521 is a `hidden beast` number, since 37 + 9 + 91 + 8 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 378847296 + 1071225 = 19464^2 + 1035^2 .

It is not a de Polignac number, because 379918521 - 2⁵ = 379918489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (379918529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21106576 + ... + 21106593.

Almost surely, 2^379918521 is an apocalyptic number.

It is an amenable number.

379918521 is a deficient number, since it is larger than the sum of its proper divisors (168852689).

379918521 is a wasteful number, since it uses less digits than its factorization.

379918521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42213175 (or 42213172 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 379918521 is about 19491.4986853243. The cubic root of 379918521 is about 724.2638717714.

The spelling of 379918521 in words is "three hundred seventy-nine million, nine hundred eighteen thousand, five hundred twenty-one".