525839994 has 24 divisors (see below), whose sum is σ = 1139991840. Its totient is φ = 175176648.

The previous prime is 525839981. The next prime is 525840001. The reversal of 525839994 is 499938525.

It is a happy number.

525839994 is a `hidden beast` number, since 52 + 583 + 9 + 9 + 9 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 525839994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26667 + ... + 41985.

It is an arithmetic number, because the mean of its divisors is an integer number (47499660).

Almost surely, 2^525839994 is an apocalyptic number.

525839994 is an abundant number, since it is smaller than the sum of its proper divisors (614151846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525839994 is a wasteful number, since it uses less digits than its factorization.

525839994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17234 (or 17231 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 525839994 is about 22931.2013204716. The cubic root of 525839994 is about 807.1443383196.

The spelling of 525839994 in words is "five hundred twenty-five million, eight hundred thirty-nine thousand, nine hundred ninety-four".