623401055 has 16 divisors (see below), whose sum is σ = 758407104. Its totient is φ = 491873280.

The previous prime is 623401043. The next prime is 623401111. The reversal of 623401055 is 550104326.

It is not a de Polignac number, because 623401055 - 2⁶ = 623400991 is a prime.

It is a super-2 number, since 2×623401055² = 777257750750226050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 148769 + ... + 152901.

It is an arithmetic number, because the mean of its divisors is an integer number (47400444).

Almost surely, 2^623401055 is an apocalyptic number.

623401055 is a deficient number, since it is larger than the sum of its proper divisors (135006049).

623401055 is a wasteful number, since it uses less digits than its factorization.

623401055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 623401055 is about 24968.0006207946. Note that the first 3 decimals coincide. The cubic root of 623401055 is about 854.2582420266.

The spelling of 623401055 in words is "six hundred twenty-three million, four hundred one thousand, fifty-five".