118265591 has 2 divisors, whose sum is σ = 118265592. Its totient is φ = 118265590.

The previous prime is 118265569. The next prime is 118265593. The reversal of 118265591 is 195562811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118265591 - 2¹⁰ = 118264567 is a prime.

Together with 118265593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118265593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59132795 + 59132796.

It is an arithmetic number, because the mean of its divisors is an integer number (59132796).

Almost surely, 2^118265591 is an apocalyptic number.

118265591 is a deficient number, since it is larger than the sum of its proper divisors (1).

118265591 is an equidigital number, since it uses as much as digits as its factorization.

118265591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 38.

The square root of 118265591 is about 10874.9984367815. The cubic root of 118265591 is about 490.8545286046.

The spelling of 118265591 in words is "one hundred eighteen million, two hundred sixty-five thousand, five hundred ninety-one".