525188889 has 9 divisors (see below), whose sum is σ = 758705493. Its totient is φ = 350080092.

The previous prime is 525188879. The next prime is 525188921. The reversal of 525188889 is 988881525.

It is a happy number.

The square root of 525188889 is 22917.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-525188889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (525188809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 64932 + ... + 72570.

Almost surely, 2^525188889 is an apocalyptic number.

525188889 is the 22917-th square number.

525188889 is the 11459-th centered octagonal number.

It is an amenable number.

525188889 is a deficient number, since it is larger than the sum of its proper divisors (233516604).

525188889 is an frugal number, since it uses more digits than its factorization.

525188889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15284 (or 7642 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 54.

The cubic root of 525188889 is about 806.8110602762.

The spelling of 525188889 in words is "five hundred twenty-five million, one hundred eighty-eight thousand, eight hundred eighty-nine".