523461621 has 4 divisors (see below), whose sum is σ = 697948832. Its totient is φ = 348974412.

The previous prime is 523461619. The next prime is 523461641. The reversal of 523461621 is 126164325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 523461621 - 2¹ = 523461619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523461641) 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 3 ways as a sum of consecutive naturals, for example, 87243601 + ... + 87243606.

It is an arithmetic number, because the mean of its divisors is an integer number (174487208).

Almost surely, 2^523461621 is an apocalyptic number.

It is an amenable number.

523461621 is a deficient number, since it is larger than the sum of its proper divisors (174487211).

523461621 is a wasteful number, since it uses less digits than its factorization.

523461621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174487210.

The product of its digits is 8640, while the sum is 30.

The square root of 523461621 is about 22879.2836644857. The cubic root of 523461621 is about 805.9255950584.

The spelling of 523461621 in words is "five hundred twenty-three million, four hundred sixty-one thousand, six hundred twenty-one".