525785989 has 2 divisors, whose sum is σ = 525785990. Its totient is φ = 525785988.

The previous prime is 525785971. The next prime is 525786007. The reversal of 525785989 is 989587525.

It is a balanced prime because it is at equal distance from previous prime (525785971) and next prime (525786007).

It can be written as a sum of positive squares in only one way, i.e., 525784900 + 1089 = 22930^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 525785989 - 2²⁵ = 492231557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525785929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262892994 + 262892995.

It is an arithmetic number, because the mean of its divisors is an integer number (262892995).

Almost surely, 2^525785989 is an apocalyptic number.

It is an amenable number.

525785989 is a deficient number, since it is larger than the sum of its proper divisors (1).

525785989 is an equidigital number, since it uses as much as digits as its factorization.

525785989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 58.

The square root of 525785989 is about 22930.0237461717. The cubic root of 525785989 is about 807.1167055018.

The spelling of 525785989 in words is "five hundred twenty-five million, seven hundred eighty-five thousand, nine hundred eighty-nine".