379643521 has 4 divisors (see below), whose sum is σ = 379699012. Its totient is φ = 379588032.

The previous prime is 379643519. The next prime is 379643533. The reversal of 379643521 is 125346973.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125346973 = 1439 ⋅87107.

It can be written as a sum of positive squares in 2 ways, for example, as 196420225 + 183223296 = 14015^2 + 13536^2 .

It is a cyclic number.

It is not a de Polignac number, because 379643521 - 2¹ = 379643519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (379643821) 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, 15756 + ... + 31741.

It is an arithmetic number, because the mean of its divisors is an integer number (94924753).

Almost surely, 2^379643521 is an apocalyptic number.

It is an amenable number.

379643521 is a deficient number, since it is larger than the sum of its proper divisors (55491).

379643521 is an equidigital number, since it uses as much as digits as its factorization.

379643521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55490.

The product of its digits is 136080, while the sum is 40.

The square root of 379643521 is about 19484.4430508034. The cubic root of 379643521 is about 724.0890793450.

The spelling of 379643521 in words is "three hundred seventy-nine million, six hundred forty-three thousand, five hundred twenty-one".