525569489 has 4 divisors (see below), whose sum is σ = 525667380. Its totient is φ = 525471600.

The previous prime is 525569353. The next prime is 525569491. The reversal of 525569489 is 984965525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 372181264 + 153388225 = 19292^2 + 12385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525569489 is a prime.

It is a super-2 number, since 2×525569489² = 552446575535442242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525569489.

It is not an unprimeable number, because it can be changed into a prime (725569489) 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 3 ways as a sum of consecutive naturals, for example, 40394 + ... + 51795.

It is an arithmetic number, because the mean of its divisors is an integer number (131416845).

Almost surely, 2^525569489 is an apocalyptic number.

It is an amenable number.

525569489 is a deficient number, since it is larger than the sum of its proper divisors (97891).

525569489 is an equidigital number, since it uses as much as digits as its factorization.

525569489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97890.

The product of its digits is 3888000, while the sum is 53.

The square root of 525569489 is about 22925.3023753232. The cubic root of 525569489 is about 807.0059096267.

The spelling of 525569489 in words is "five hundred twenty-five million, five hundred sixty-nine thousand, four hundred eighty-nine".