523687401 has 12 divisors (see below), whose sum is σ = 756641028. Its totient is φ = 349030944.

The previous prime is 523687393. The next prime is 523687403. The reversal of 523687401 is 104786325.

523687401 is a `hidden beast` number, since 523 + 68 + 74 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 317018025 + 206669376 = 17805^2 + 14376^2 .

It is not a de Polignac number, because 523687401 - 2³ = 523687393 is a prime.

It is a super-2 number, since 2×523687401² = 548496987932269602, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (523687403) 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 11 ways as a sum of consecutive naturals, for example, 49671 + ... + 59283.

It is an arithmetic number, because the mean of its divisors is an integer number (63053419).

Almost surely, 2^523687401 is an apocalyptic number.

It is an amenable number.

523687401 is a deficient number, since it is larger than the sum of its proper divisors (232953627).

523687401 is a wasteful number, since it uses less digits than its factorization.

523687401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15672 (or 15669 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 523687401 is about 22884.2172905258. The cubic root of 523687401 is about 806.0414492863.

The spelling of 523687401 in words is "five hundred twenty-three million, six hundred eighty-seven thousand, four hundred one".