525987889 has 4 divisors (see below), whose sum is σ = 601129024. Its totient is φ = 450846756.

The previous prime is 525987859. The next prime is 525987941. The reversal of 525987889 is 988789525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 525987889 - 2⁹ = 525987377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525987859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37570557 + ... + 37570570.

It is an arithmetic number, because the mean of its divisors is an integer number (150282256).

Almost surely, 2^525987889 is an apocalyptic number.

It is an amenable number.

525987889 is a deficient number, since it is larger than the sum of its proper divisors (75141135).

525987889 is an equidigital number, since it uses as much as digits as its factorization.

525987889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75141134.

The product of its digits is 14515200, while the sum is 61.

The square root of 525987889 is about 22934.4258484925. The cubic root of 525987889 is about 807.2200022882.

The spelling of 525987889 in words is "five hundred twenty-five million, nine hundred eighty-seven thousand, eight hundred eighty-nine".