118197137 has 4 divisors (see below), whose sum is σ = 121080036. Its totient is φ = 115314240.

The previous prime is 118197133. The next prime is 118197143. The reversal of 118197137 is 731791811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731791811 = 11801 ⋅62011.

It can be written as a sum of positive squares in 2 ways, for example, as 6345361 + 111851776 = 2519^2 + 10576^2 .

It is a cyclic number.

It is not a de Polignac number, because 118197137 - 2² = 118197133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118197137.

It is not an unprimeable number, because it can be changed into a prime (118197133) 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, 1441388 + ... + 1441469.

It is an arithmetic number, because the mean of its divisors is an integer number (30270009).

Almost surely, 2^118197137 is an apocalyptic number.

It is an amenable number.

118197137 is a deficient number, since it is larger than the sum of its proper divisors (2882899).

118197137 is an equidigital number, since it uses as much as digits as its factorization.

118197137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882898.

The product of its digits is 10584, while the sum is 38.

The square root of 118197137 is about 10871.8506704241. The cubic root of 118197137 is about 490.7598055308.

The spelling of 118197137 in words is "one hundred eighteen million, one hundred ninety-seven thousand, one hundred thirty-seven".