525605869 has 2 divisors, whose sum is σ = 525605870. Its totient is φ = 525605868.

The previous prime is 525605791. The next prime is 525605891. The reversal of 525605869 is 968506525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496844100 + 28761769 = 22290^2 + 5363^2 .

It is a cyclic number.

It is not a de Polignac number, because 525605869 - 2⁷ = 525605741 is a prime.

It is a super-2 number, since 2×525605869² = 552523059054490322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525605669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262802934 + 262802935.

It is an arithmetic number, because the mean of its divisors is an integer number (262802935).

Almost surely, 2^525605869 is an apocalyptic number.

It is an amenable number.

525605869 is a deficient number, since it is larger than the sum of its proper divisors (1).

525605869 is an equidigital number, since it uses as much as digits as its factorization.

525605869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 525605869 is about 22926.0958080524. The cubic root of 525605869 is about 807.0245295544.

The spelling of 525605869 in words is "five hundred twenty-five million, six hundred five thousand, eight hundred sixty-nine".