118989191 has 16 divisors (see below), whose sum is σ = 129945600. Its totient is φ = 108540000.

The previous prime is 118989181. The next prime is 118989193. The reversal of 118989191 is 191989811.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118989191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118989193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158066 + ... + 158816.

It is an arithmetic number, because the mean of its divisors is an integer number (8121600).

Almost surely, 2^118989191 is an apocalyptic number.

118989191 is a deficient number, since it is larger than the sum of its proper divisors (10956409).

118989191 is a wasteful number, since it uses less digits than its factorization.

118989191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070.

The product of its digits is 46656, while the sum is 47.

The square root of 118989191 is about 10908.2166736823. The cubic root of 118989191 is about 491.8535805402.

The spelling of 118989191 in words is "one hundred eighteen million, nine hundred eighty-nine thousand, one hundred ninety-one".