318239272129 has 3 divisors (see below), whose sum is σ = 318239836257. Its totient is φ = 318238708002.

The previous prime is 318239272123. The next prime is 318239272187. The reversal of 318239272129 is 921272932813.

The square root of 318239272129 is 564127.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 318239272129 - 2²¹ = 318237174977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318239272123) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 282064 + ... + 846190.

It is an arithmetic number, because the mean of its divisors is an integer number (106079945419).

Almost surely, 2^318239272129 is an apocalyptic number.

318239272129 is the 564127-th square number.

318239272129 is the 282064-th centered octagonal number.

It is an amenable number.

318239272129 is a deficient number, since it is larger than the sum of its proper divisors (564128).

318239272129 is an frugal number, since it uses more digits than its factorization.

318239272129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128254 (or 564127 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

Multiplying 318239272129 by its sum of digits (49), we get a square (15593724334321 = 3948889²).

The spelling of 318239272129 in words is "three hundred eighteen billion, two hundred thirty-nine million, two hundred seventy-two thousand, one hundred twenty-nine".