523426689 has 12 divisors (see below), whose sum is σ = 757750500. Its totient is φ = 348171264.

The previous prime is 523426637. The next prime is 523426693. The reversal of 523426689 is 986624325.

523426689 is a `hidden beast` number, since 523 + 42 + 6 + 6 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 382007025 + 141419664 = 19545^2 + 11892^2 .

It is not a de Polignac number, because 523426689 - 2¹¹ = 523424641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (523426619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60724 + ... + 68805.

It is an arithmetic number, because the mean of its divisors is an integer number (63145875).

Almost surely, 2^523426689 is an apocalyptic number.

It is an amenable number.

523426689 is a deficient number, since it is larger than the sum of its proper divisors (234323811).

523426689 is a wasteful number, since it uses less digits than its factorization.

523426689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129984 (or 129981 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 523426689 is about 22878.5202537227. The cubic root of 523426689 is about 805.9076674664.

The spelling of 523426689 in words is "five hundred twenty-three million, four hundred twenty-six thousand, six hundred eighty-nine".