318135897 has 16 divisors (see below), whose sum is σ = 471593280. Its totient is φ = 211964256.

The previous prime is 318135863. The next prime is 318135907. The reversal of 318135897 is 798531813.

It is not a de Polignac number, because 318135897 - 2⁸ = 318135641 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (318135817) 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 15 ways as a sum of consecutive naturals, for example, 72858 + ... + 77100.

It is an arithmetic number, because the mean of its divisors is an integer number (29474580).

Almost surely, 2^318135897 is an apocalyptic number.

It is an amenable number.

318135897 is a deficient number, since it is larger than the sum of its proper divisors (153457383).

318135897 is a wasteful number, since it uses less digits than its factorization.

318135897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7029 (or 7023 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 318135897 is about 17836.3644557965. The cubic root of 318135897 is about 682.6596366105.

The spelling of 318135897 in words is "three hundred eighteen million, one hundred thirty-five thousand, eight hundred ninety-seven".