118506691 has 2 divisors, whose sum is σ = 118506692. Its totient is φ = 118506690.

The previous prime is 118506659. The next prime is 118506709. The reversal of 118506691 is 196605811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118506691 - 2⁵ = 118506659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118506691.

It is not a weakly prime, because it can be changed into another prime (118506611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59253345 + 59253346.

It is an arithmetic number, because the mean of its divisors is an integer number (59253346).

Almost surely, 2^118506691 is an apocalyptic number.

118506691 is a deficient number, since it is larger than the sum of its proper divisors (1).

118506691 is an equidigital number, since it uses as much as digits as its factorization.

118506691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 118506691 is about 10886.0778520090. The cubic root of 118506691 is about 491.1878594186.

The spelling of 118506691 in words is "one hundred eighteen million, five hundred six thousand, six hundred ninety-one".