118820591 has 2 divisors, whose sum is σ = 118820592. Its totient is φ = 118820590.

The previous prime is 118820561. The next prime is 118820593. The reversal of 118820591 is 195028811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118820591 - 2²² = 114626287 is a prime.

Together with 118820593, 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 (118820593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59410295 + 59410296.

It is an arithmetic number, because the mean of its divisors is an integer number (59410296).

Almost surely, 2^118820591 is an apocalyptic number.

118820591 is a deficient number, since it is larger than the sum of its proper divisors (1).

118820591 is an equidigital number, since it uses as much as digits as its factorization.

118820591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 118820591 is about 10900.4858148616. The cubic root of 118820591 is about 491.6211624777.

The spelling of 118820591 in words is "one hundred eighteen million, eight hundred twenty thousand, five hundred ninety-one".