318513089 has 4 divisors (see below), whose sum is σ = 322876356. Its totient is φ = 314149824.

The previous prime is 318513077. The next prime is 318513101. The reversal of 318513089 is 980315813.

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

It is an interprime number because it is at equal distance from previous prime (318513077) and next prime (318513101).

It can be written as a sum of positive squares in 2 ways, for example, as 74528689 + 243984400 = 8633^2 + 15620^2 .

It is a cyclic number.

It is not a de Polignac number, because 318513089 - 2⁴ = 318513073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318513059) 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, 2181524 + ... + 2181669.

It is an arithmetic number, because the mean of its divisors is an integer number (80719089).

Almost surely, 2^318513089 is an apocalyptic number.

It is an amenable number.

318513089 is a deficient number, since it is larger than the sum of its proper divisors (4363267).

318513089 is an equidigital number, since it uses as much as digits as its factorization.

318513089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363266.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 318513089 is about 17846.9350029634. The cubic root of 318513089 is about 682.9293243538.

The spelling of 318513089 in words is "three hundred eighteen million, five hundred thirteen thousand, eighty-nine".