54400123 has 4 divisors (see below), whose sum is σ = 54417168. Its totient is φ = 54383080.

The previous prime is 54400079. The next prime is 54400127. The reversal of 54400123 is 32100445.

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

It is a cyclic number.

It is not a de Polignac number, because 54400123 - 2¹⁷ = 54269051 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 54400123.

It is not an unprimeable number, because it can be changed into a prime (54400127) 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, 2143 + ... + 10648.

It is an arithmetic number, because the mean of its divisors is an integer number (13604292).

Almost surely, 2^54400123 is an apocalyptic number.

54400123 is a deficient number, since it is larger than the sum of its proper divisors (17045).

54400123 is a wasteful number, since it uses less digits than its factorization.

54400123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17044.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 54400123 is about 7375.6439040941. The cubic root of 54400123 is about 378.9075804477.

Adding to 54400123 its reverse (32100445), we get a palindrome (86500568).

The spelling of 54400123 in words is "fifty-four million, four hundred thousand, one hundred twenty-three".