313440123 has 4 divisors (see below), whose sum is σ = 417920168. Its totient is φ = 208960080.

The previous prime is 313440109. The next prime is 313440139. The reversal of 313440123 is 321044313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321044313 = 3 ⋅107014771.

It is not a de Polignac number, because 313440123 - 2⁶ = 313440059 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 313440123.

It is not an unprimeable number, because it can be changed into a prime (313444123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52240018 + ... + 52240023.

It is an arithmetic number, because the mean of its divisors is an integer number (104480042).

Almost surely, 2^313440123 is an apocalyptic number.

313440123 is a deficient number, since it is larger than the sum of its proper divisors (104480045).

313440123 is a wasteful number, since it uses less digits than its factorization.

313440123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104480044.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 313440123 is about 17704.2402548090. The cubic root of 313440123 is about 679.2842259288.

Adding to 313440123 its reverse (321044313), we get a palindrome (634484436).

The spelling of 313440123 in words is "three hundred thirteen million, four hundred forty thousand, one hundred twenty-three".