523723643 has 2 divisors, whose sum is σ = 523723644. Its totient is φ = 523723642.

The previous prime is 523723633. The next prime is 523723649. The reversal of 523723643 is 346327325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523723643 - 2²⁰ = 522675067 is a prime.

It is not a weakly prime, because it can be changed into another prime (523723649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261861821 + 261861822.

It is an arithmetic number, because the mean of its divisors is an integer number (261861822).

Almost surely, 2^523723643 is an apocalyptic number.

523723643 is a deficient number, since it is larger than the sum of its proper divisors (1).

523723643 is an equidigital number, since it uses as much as digits as its factorization.

523723643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 35.

The square root of 523723643 is about 22885.0091326178. The cubic root of 523723643 is about 806.0600429997.

The spelling of 523723643 in words is "five hundred twenty-three million, seven hundred twenty-three thousand, six hundred forty-three".