318121423 has 4 divisors (see below), whose sum is σ = 324123768. Its totient is φ = 312119080.

The previous prime is 318121421. The next prime is 318121429. The reversal of 318121423 is 324121813.

It is a happy number.

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 318121423 - 2¹ = 318121421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001093 + ... + 3001198.

It is an arithmetic number, because the mean of its divisors is an integer number (81030942).

Almost surely, 2^318121423 is an apocalyptic number.

318121423 is a deficient number, since it is larger than the sum of its proper divisors (6002345).

318121423 is an equidigital number, since it uses as much as digits as its factorization.

318121423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002344.

The product of its digits is 1152, while the sum is 25.

The square root of 318121423 is about 17835.9587070614. The cubic root of 318121423 is about 682.6492836288.

The spelling of 318121423 in words is "three hundred eighteen million, one hundred twenty-one thousand, four hundred twenty-three".