118992281 has 4 divisors (see below), whose sum is σ = 119398692. Its totient is φ = 118585872.

The previous prime is 118992257. The next prime is 118992287. The reversal of 118992281 is 182299811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182299811 = 13171 ⋅13841.

It can be written as a sum of positive squares in 2 ways, for example, as 79049881 + 39942400 = 8891^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 118992281 - 2⁶ = 118992217 is a prime.

It is a super-2 number, since 2×118992281² = 28318325875165922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118992287) 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, 202766 + ... + 203351.

It is an arithmetic number, because the mean of its divisors is an integer number (29849673).

Almost surely, 2^118992281 is an apocalyptic number.

It is an amenable number.

118992281 is a deficient number, since it is larger than the sum of its proper divisors (406411).

118992281 is an equidigital number, since it uses as much as digits as its factorization.

118992281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406410.

The product of its digits is 20736, while the sum is 41.

The square root of 118992281 is about 10908.3583091132. The cubic root of 118992281 is about 491.8578381102.

The spelling of 118992281 in words is "one hundred eighteen million, nine hundred ninety-two thousand, two hundred eighty-one".