521704479 has 8 divisors (see below), whose sum is σ = 695734272. Its totient is φ = 347738840.

The previous prime is 521704471. The next prime is 521704499. The reversal of 521704479 is 974407125.

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

It is a cyclic number.

It is not a de Polignac number, because 521704479 - 2³ = 521704471 is a prime.

It is a super-2 number, since 2×521704479² = 544351126817322882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521704471) 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, 8152 + ... + 33314.

It is an arithmetic number, because the mean of its divisors is an integer number (86966784).

Almost surely, 2^521704479 is an apocalyptic number.

521704479 is a deficient number, since it is larger than the sum of its proper divisors (174029793).

521704479 is a wasteful number, since it uses less digits than its factorization.

521704479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32077.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 521704479 is about 22840.8511006048. The cubic root of 521704479 is about 805.0228143168.

The spelling of 521704479 in words is "five hundred twenty-one million, seven hundred four thousand, four hundred seventy-nine".