118261689 has 16 divisors (see below), whose sum is σ = 194070912. Its totient is φ = 62379648.

The previous prime is 118261669. The next prime is 118261697. The reversal of 118261689 is 986162811.

It is not a de Polignac number, because 118261689 - 2⁸ = 118261433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118261689.

It is not an unprimeable number, because it can be changed into a prime (118261609) 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, 216324 + ... + 216869.

It is an arithmetic number, because the mean of its divisors is an integer number (12129432).

Almost surely, 2^118261689 is an apocalyptic number.

It is an amenable number.

118261689 is a deficient number, since it is larger than the sum of its proper divisors (75809223).

118261689 is a wasteful number, since it uses less digits than its factorization.

118261689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433216.

The product of its digits is 41472, while the sum is 42.

The square root of 118261689 is about 10874.8190329771. The cubic root of 118261689 is about 490.8491302031.

The spelling of 118261689 in words is "one hundred eighteen million, two hundred sixty-one thousand, six hundred eighty-nine".