118978679 has 4 divisors (see below), whose sum is σ = 121880640. Its totient is φ = 116076720.

The previous prime is 118978669. The next prime is 118978681. The reversal of 118978679 is 976879811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976879811 = 1223 ⋅798757.

It is a cyclic number.

It is not a de Polignac number, because 118978679 - 2²⁰ = 117930103 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 (118978669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450919 + ... + 1451000.

It is an arithmetic number, because the mean of its divisors is an integer number (30470160).

Almost surely, 2^118978679 is an apocalyptic number.

118978679 is a deficient number, since it is larger than the sum of its proper divisors (2901961).

118978679 is an equidigital number, since it uses as much as digits as its factorization.

118978679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901960.

The product of its digits is 1524096, while the sum is 56.

The square root of 118978679 is about 10907.7348244262. The cubic root of 118978679 is about 491.8390959834.

The spelling of 118978679 in words is "one hundred eighteen million, nine hundred seventy-eight thousand, six hundred seventy-nine".