623555401 has 16 divisors (see below), whose sum is σ = 718737408. Its totient is φ = 529920000.

The previous prime is 623555389. The next prime is 623555417. The reversal of 623555401 is 104555326.

It is a cyclic number.

It is not a de Polignac number, because 623555401 - 2⁹ = 623554889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623555431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541176 + ... + 542326.

It is an arithmetic number, because the mean of its divisors is an integer number (44921088).

Almost surely, 2^623555401 is an apocalyptic number.

It is an amenable number.

623555401 is a deficient number, since it is larger than the sum of its proper divisors (95182007).

623555401 is a wasteful number, since it uses less digits than its factorization.

623555401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 623555401 is about 24971.0913057479. The cubic root of 623555401 is about 854.3287372889.

The spelling of 623555401 in words is "six hundred twenty-three million, five hundred fifty-five thousand, four hundred one".