118457897 has 4 divisors (see below), whose sum is σ = 121347156. Its totient is φ = 115568640.

The previous prime is 118457879. The next prime is 118457909. The reversal of 118457897 is 798754811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56190016 + 62267881 = 7496^2 + 7891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118457897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118457827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1444568 + ... + 1444649.

It is an arithmetic number, because the mean of its divisors is an integer number (30336789).

Almost surely, 2^118457897 is an apocalyptic number.

It is an amenable number.

118457897 is a deficient number, since it is larger than the sum of its proper divisors (2889259).

118457897 is an equidigital number, since it uses as much as digits as its factorization.

118457897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889258.

The product of its digits is 564480, while the sum is 50.

The square root of 118457897 is about 10883.8365018958. The cubic root of 118457897 is about 491.1204361917.

The spelling of 118457897 in words is "one hundred eighteen million, four hundred fifty-seven thousand, eight hundred ninety-seven".