523440459 has 12 divisors (see below), whose sum is σ = 782152800. Its totient is φ = 336927024.

The previous prime is 523440439. The next prime is 523440473. The reversal of 523440459 is 954044325.

It is a happy number.

It is not a de Polignac number, because 523440459 - 2⁹ = 523439947 is a prime.

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 not an unprimeable number, because it can be changed into a prime (523440409) 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, 1002499 + ... + 1003020.

It is an arithmetic number, because the mean of its divisors is an integer number (65179400).

Almost surely, 2^523440459 is an apocalyptic number.

523440459 is a deficient number, since it is larger than the sum of its proper divisors (258712341).

523440459 is a wasteful number, since it uses less digits than its factorization.

523440459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005554 (or 2005551 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 523440459 is about 22878.8211890386. The cubic root of 523440459 is about 805.9147345186.

The spelling of 523440459 in words is "five hundred twenty-three million, four hundred forty thousand, four hundred fifty-nine".