523826421 has 16 divisors (see below), whose sum is σ = 714230784. Its totient is φ = 341339504.

The previous prime is 523826393. The next prime is 523826483. The reversal of 523826421 is 124628325.

It is a cyclic number.

It is not a de Polignac number, because 523826421 - 2⁷ = 523826293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523836421) 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 15 ways as a sum of consecutive naturals, for example, 131566 + ... + 135488.

It is an arithmetic number, because the mean of its divisors is an integer number (44639424).

Almost surely, 2^523826421 is an apocalyptic number.

It is an amenable number.

523826421 is a deficient number, since it is larger than the sum of its proper divisors (190404363).

523826421 is a wasteful number, since it uses less digits than its factorization.

523826421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920.

The product of its digits is 23040, while the sum is 33.

The square root of 523826421 is about 22887.2545535720. The cubic root of 523826421 is about 806.1127678935.

The spelling of 523826421 in words is "five hundred twenty-three million, eight hundred twenty-six thousand, four hundred twenty-one".