118570891 has 2 divisors, whose sum is σ = 118570892. Its totient is φ = 118570890.

The previous prime is 118570889. The next prime is 118570919. The reversal of 118570891 is 198075811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118570891 - 2¹ = 118570889 is a prime.

Together with 118570889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (118570831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59285445 + 59285446.

It is an arithmetic number, because the mean of its divisors is an integer number (59285446).

Almost surely, 2^118570891 is an apocalyptic number.

118570891 is a deficient number, since it is larger than the sum of its proper divisors (1).

118570891 is an equidigital number, since it uses as much as digits as its factorization.

118570891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 118570891 is about 10889.0261731709. The cubic root of 118570891 is about 491.2765423657.

The spelling of 118570891 in words is "one hundred eighteen million, five hundred seventy thousand, eight hundred ninety-one".