144400123 has 4 divisors (see below), whose sum is σ = 165028720. Its totient is φ = 123771528.

The previous prime is 144400103. The next prime is 144400127. The reversal of 144400123 is 321004441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321004441 = 173 ⋅1855517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144400123 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 144400123.

It is not an unprimeable number, because it can be changed into a prime (144400127) 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, 10314288 + ... + 10314301.

It is an arithmetic number, because the mean of its divisors is an integer number (41257180).

Almost surely, 2^144400123 is an apocalyptic number.

144400123 is a deficient number, since it is larger than the sum of its proper divisors (20628597).

144400123 is an equidigital number, since it uses as much as digits as its factorization.

144400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20628596.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 144400123 is about 12016.6602265355. The cubic root of 144400123 is about 524.6333016026.

Adding to 144400123 its reverse (321004441), we get a palindrome (465404564).

The spelling of 144400123 in words is "one hundred forty-four million, four hundred thousand, one hundred twenty-three".