118372621 has 4 divisors (see below), whose sum is σ = 118880892. Its totient is φ = 117864352.

The previous prime is 118372613. The next prime is 118372633. The reversal of 118372621 is 126273811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8940100 + 109432521 = 2990^2 + 10461^2 .

It is a cyclic number.

It is not a de Polignac number, because 118372621 - 2³ = 118372613 is a prime.

It is a super-3 number, since 3×118372621³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118372021) 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, 253786 + ... + 254251.

It is an arithmetic number, because the mean of its divisors is an integer number (29720223).

Almost surely, 2^118372621 is an apocalyptic number.

It is an amenable number.

118372621 is a deficient number, since it is larger than the sum of its proper divisors (508271).

118372621 is an equidigital number, since it uses as much as digits as its factorization.

118372621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508270.

The product of its digits is 4032, while the sum is 31.

The square root of 118372621 is about 10879.9182441781. The cubic root of 118372621 is about 491.0025579098.

The spelling of 118372621 in words is "one hundred eighteen million, three hundred seventy-two thousand, six hundred twenty-one".