1118981337 has 8 divisors (see below), whose sum is σ = 1492987104. Its totient is φ = 745481568.

The previous prime is 1118981333. The next prime is 1118981387. The reversal of 1118981337 is 7331898111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1118981337 - 2² = 1118981333 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1118981333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121308 + ... + 130205.

It is an arithmetic number, because the mean of its divisors is an integer number (186623388).

Almost surely, 2^1118981337 is an apocalyptic number.

It is an amenable number.

1118981337 is a deficient number, since it is larger than the sum of its proper divisors (374005767).

1118981337 is a wasteful number, since it uses less digits than its factorization.

1118981337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252999.

The product of its digits is 36288, while the sum is 42.

The square root of 1118981337 is about 33451.1784097362. The cubic root of 1118981337 is about 1038.1838795347.

The spelling of 1118981337 in words is "one billion, one hundred eighteen million, nine hundred eighty-one thousand, three hundred thirty-seven".