623223857 has 4 divisors (see below), whose sum is σ = 623293440. Its totient is φ = 623154276.

The previous prime is 623223829. The next prime is 623223863. The reversal of 623223857 is 758322326.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 623223857 - 2¹⁰ = 623222833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623223857.

It is not an unprimeable number, because it can be changed into a prime (623223877) 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, 18953 + ... + 40070.

It is an arithmetic number, because the mean of its divisors is an integer number (155823360).

Almost surely, 2^623223857 is an apocalyptic number.

It is an amenable number.

623223857 is a deficient number, since it is larger than the sum of its proper divisors (69583).

623223857 is a wasteful number, since it uses less digits than its factorization.

623223857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69582.

The product of its digits is 120960, while the sum is 38.

The square root of 623223857 is about 24964.4518666042. The cubic root of 623223857 is about 854.1772951010.

The spelling of 623223857 in words is "six hundred twenty-three million, two hundred twenty-three thousand, eight hundred fifty-seven".