118894981 has 4 divisors (see below), whose sum is σ = 124064352. Its totient is φ = 113725612.

The previous prime is 118894969. The next prime is 118895047. The reversal of 118894981 is 189498811.

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, and also an emirpimes, since its reverse is a distinct semiprime: 189498811 = 137 ⋅1383203.

It is a cyclic number.

It is not a de Polignac number, because 118894981 - 2⁹ = 118894469 is a prime.

It is a super-2 number, since 2×118894981² = 28272033013980722, 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 (118894081) 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, 2584651 + ... + 2584696.

It is an arithmetic number, because the mean of its divisors is an integer number (31016088).

Almost surely, 2^118894981 is an apocalyptic number.

It is an amenable number.

118894981 is a deficient number, since it is larger than the sum of its proper divisors (5169371).

118894981 is an equidigital number, since it uses as much as digits as its factorization.

118894981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5169370.

The product of its digits is 165888, while the sum is 49.

The square root of 118894981 is about 10903.8975141919. The cubic root of 118894981 is about 491.7237374845.

It can be divided in two parts, 1188 and 94981, that added together give a palindrome (96169).

The spelling of 118894981 in words is "one hundred eighteen million, eight hundred ninety-four thousand, nine hundred eighty-one".