118642919 has 4 divisors (see below), whose sum is σ = 119794896. Its totient is φ = 117490944.

The previous prime is 118642907. The next prime is 118642933. The reversal of 118642919 is 919246811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 118642919 - 2¹⁶ = 118577383 is a prime.

It is a super-2 number, since 2×118642919² = 28152284457681122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118642969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575834 + ... + 576039.

It is an arithmetic number, because the mean of its divisors is an integer number (29948724).

Almost surely, 2^118642919 is an apocalyptic number.

118642919 is a deficient number, since it is larger than the sum of its proper divisors (1151977).

118642919 is a wasteful number, since it uses less digits than its factorization.

118642919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151976.

The product of its digits is 31104, while the sum is 41.

The square root of 118642919 is about 10892.3330375085. Note that the first 3 decimals coincide. The cubic root of 118642919 is about 491.3760004583.

The spelling of 118642919 in words is "one hundred eighteen million, six hundred forty-two thousand, nine hundred nineteen".