623946559 has 4 divisors (see below), whose sum is σ = 627774616. Its totient is φ = 620118504.

The previous prime is 623946541. The next prime is 623946601. The reversal of 623946559 is 955649326.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 623946559 - 2⁵ = 623946527 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 (623946259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1913784 + ... + 1914109.

It is an arithmetic number, because the mean of its divisors is an integer number (156943654).

Almost surely, 2^623946559 is an apocalyptic number.

623946559 is a deficient number, since it is larger than the sum of its proper divisors (3828057).

623946559 is a wasteful number, since it uses less digits than its factorization.

623946559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3828056.

The product of its digits is 1749600, while the sum is 49.

The square root of 623946559 is about 24978.9222946067. The cubic root of 623946559 is about 854.5073408619.

The spelling of 623946559 in words is "six hundred twenty-three million, nine hundred forty-six thousand, five hundred fifty-nine".