523487921 has 16 divisors (see below), whose sum is σ = 581188608. Its totient is φ = 467547600.

The previous prime is 523487911. The next prime is 523487929. The reversal of 523487921 is 129784325.

It is a cyclic number.

It is not a de Polignac number, because 523487921 - 2¹⁰ = 523486897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (523487929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146660 + ... + 150186.

It is an arithmetic number, because the mean of its divisors is an integer number (36324288).

Almost surely, 2^523487921 is an apocalyptic number.

It is an amenable number.

523487921 is a deficient number, since it is larger than the sum of its proper divisors (57700687).

523487921 is a wasteful number, since it uses less digits than its factorization.

523487921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772.

The product of its digits is 120960, while the sum is 41.

The square root of 523487921 is about 22879.8584130235. The cubic root of 523487921 is about 805.9390920608.

The spelling of 523487921 in words is "five hundred twenty-three million, four hundred eighty-seven thousand, nine hundred twenty-one".