118999861 has 4 divisors (see below), whose sum is σ = 124173792. Its totient is φ = 113825932.

The previous prime is 118999849. The next prime is 118999879. The reversal of 118999861 is 168999811.

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.

It is a cyclic number.

It is not a de Polignac number, because 118999861 - 2¹⁹ = 118475573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118999799 and 118999808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118999841) 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, 2586931 + ... + 2586976.

It is an arithmetic number, because the mean of its divisors is an integer number (31043448).

Almost surely, 2^118999861 is an apocalyptic number.

It is an amenable number.

118999861 is a deficient number, since it is larger than the sum of its proper divisors (5173931).

118999861 is an equidigital number, since it uses as much as digits as its factorization.

118999861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173930.

The product of its digits is 279936, while the sum is 52.

The square root of 118999861 is about 10908.7057435793. The cubic root of 118999861 is about 491.8682819340.

The spelling of 118999861 in words is "one hundred eighteen million, nine hundred ninety-nine thousand, eight hundred sixty-one".