123623455 has 4 divisors (see below), whose sum is σ = 148348152. Its totient is φ = 98898760.

The previous prime is 123623449. The next prime is 123623471. The reversal of 123623455 is 554326321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123623455 - 2³ = 123623447 is a prime.

It is a super-2 number, since 2×123623455² = 30565517252274050, 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 3 ways as a sum of consecutive naturals, for example, 12362341 + ... + 12362350.

It is an arithmetic number, because the mean of its divisors is an integer number (37087038).

Almost surely, 2^123623455 is an apocalyptic number.

123623455 is a deficient number, since it is larger than the sum of its proper divisors (24724697).

123623455 is an equidigital number, since it uses as much as digits as its factorization.

123623455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24724696.

The product of its digits is 21600, while the sum is 31.

The square root of 123623455 is about 11118.6085010670. The cubic root of 123623455 is about 498.1578278053.

Adding to 123623455 its reverse (554326321), we get a palindrome (677949776).

The spelling of 123623455 in words is "one hundred twenty-three million, six hundred twenty-three thousand, four hundred fifty-five".