623138855 has 8 divisors (see below), whose sum is σ = 748090512. Its totient is φ = 498295168.

The previous prime is 623138779. The next prime is 623138881. The reversal of 623138855 is 558831326.

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 623138855 - 2¹⁸ = 622876711 is a prime.

It is a super-3 number, since 3×623138855³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

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, 13697 + ... + 37866.

It is an arithmetic number, because the mean of its divisors is an integer number (93511314).

Almost surely, 2^623138855 is an apocalyptic number.

623138855 is a deficient number, since it is larger than the sum of its proper divisors (124951657).

623138855 is a wasteful number, since it uses less digits than its factorization.

623138855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53985.

The product of its digits is 172800, while the sum is 41.

The square root of 623138855 is about 24962.7493477782. The cubic root of 623138855 is about 854.1384593607.

The spelling of 623138855 in words is "six hundred twenty-three million, one hundred thirty-eight thousand, eight hundred fifty-five".