525898989 has 48 divisors (see below), whose sum is σ = 949538304. Its totient is φ = 272484000.

The previous prime is 525898981. The next prime is 525898991. The reversal of 525898989 is 989898525.

It is not a de Polignac number, because 525898989 - 2³ = 525898981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525898981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 361714 + ... + 363164.

It is an arithmetic number, because the mean of its divisors is an integer number (19782048).

Almost surely, 2^525898989 is an apocalyptic number.

It is an amenable number.

525898989 is a deficient number, since it is larger than the sum of its proper divisors (423639315).

525898989 is a wasteful number, since it uses less digits than its factorization.

525898989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998 (or 1995 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 63.

The square root of 525898989 is about 22932.4876321781. The cubic root of 525898989 is about 807.1745222160.

The spelling of 525898989 in words is "five hundred twenty-five million, eight hundred ninety-eight thousand, nine hundred eighty-nine".