118959681 has 4 divisors (see below), whose sum is σ = 158612912. Its totient is φ = 79306452.

The previous prime is 118959661. The next prime is 118959683. The reversal of 118959681 is 186959811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186959811 = 3 ⋅62319937.

It is not a de Polignac number, because 118959681 - 2⁷ = 118959553 is a prime.

It is a super-2 number, since 2×118959681² = 28302811407243522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118959681.

It is not an unprimeable number, because it can be changed into a prime (118959683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19826611 + ... + 19826616.

It is an arithmetic number, because the mean of its divisors is an integer number (39653228).

Almost surely, 2^118959681 is an apocalyptic number.

It is an amenable number.

118959681 is a deficient number, since it is larger than the sum of its proper divisors (39653231).

118959681 is an equidigital number, since it uses as much as digits as its factorization.

118959681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39653230.

The product of its digits is 155520, while the sum is 48.

The square root of 118959681 is about 10906.8639397400. The cubic root of 118959681 is about 491.8129163446.

The spelling of 118959681 in words is "one hundred eighteen million, nine hundred fifty-nine thousand, six hundred eighty-one".