118943721 has 30 divisors (see below), whose sum is σ = 192422670. Its totient is φ = 73187712.

The previous prime is 118943711. The next prime is 118943749. The reversal of 118943721 is 127349811.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6350400 + 112593321 = 2520^2 + 10611^2 .

It is not a de Polignac number, because 118943721 - 2⁵ = 118943689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118943701) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 9345 + ... + 18033.

It is an arithmetic number, because the mean of its divisors is an integer number (6414089).

Almost surely, 2^118943721 is an apocalyptic number.

It is an amenable number.

118943721 is a deficient number, since it is larger than the sum of its proper divisors (73478949).

118943721 is an equidigital number, since it uses as much as digits as its factorization.

118943721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8727 (or 8705 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 118943721 is about 10906.1322658402. The cubic root of 118943721 is about 491.7909209785.

The spelling of 118943721 in words is "one hundred eighteen million, nine hundred forty-three thousand, seven hundred twenty-one".