521979002 has 8 divisors (see below), whose sum is σ = 784683156. Its totient is φ = 260417952.

The previous prime is 521978987. The next prime is 521979049. The reversal of 521979002 is 200979125.

It can be written as a sum of positive squares in 2 ways, for example, as 437688241 + 84290761 = 20921^2 + 9181^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284633 + ... + 286460.

Almost surely, 2^521979002 is an apocalyptic number.

521979002 is a deficient number, since it is larger than the sum of its proper divisors (262704154).

521979002 is a wasteful number, since it uses less digits than its factorization.

521979002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571552.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 521979002 is about 22846.8597842242. The cubic root of 521979002 is about 805.1639916404.

The spelling of 521979002 in words is "five hundred twenty-one million, nine hundred seventy-nine thousand, two".