521107379 has 8 divisors (see below), whose sum is σ = 566750352. Its totient is φ = 476258400.

The previous prime is 521107369. The next prime is 521107381. The reversal of 521107379 is 973701125.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521107379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521107339) 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, 197129 + ... + 199754.

It is an arithmetic number, because the mean of its divisors is an integer number (70843794).

Almost surely, 2^521107379 is an apocalyptic number.

521107379 is a deficient number, since it is larger than the sum of its proper divisors (45642973).

521107379 is a wasteful number, since it uses less digits than its factorization.

521107379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396997.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 521107379 is about 22827.7764795435. The cubic root of 521107379 is about 804.7155761259.

The spelling of 521107379 in words is "five hundred twenty-one million, one hundred seven thousand, three hundred seventy-nine".