623431605 has 8 divisors (see below), whose sum is σ = 997490592. Its totient is φ = 332496848.

The previous prime is 623431597. The next prime is 623431619. The reversal of 623431605 is 506134326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 623431605 - 2³ = 623431597 is a prime.

It is a super-2 number, since 2×623431605² = 777333932225752050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20781039 + ... + 20781068.

It is an arithmetic number, because the mean of its divisors is an integer number (124686324).

Almost surely, 2^623431605 is an apocalyptic number.

It is an amenable number.

623431605 is a deficient number, since it is larger than the sum of its proper divisors (374058987).

623431605 is a wasteful number, since it uses less digits than its factorization.

623431605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41562115.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 623431605 is about 24968.6123963668. The cubic root of 623431605 is about 854.2721962127.

The spelling of 623431605 in words is "six hundred twenty-three million, four hundred thirty-one thousand, six hundred five".