1118380919 has 4 divisors (see below), whose sum is σ = 1119131496. Its totient is φ = 1117630344.

The previous prime is 1118380909. The next prime is 1118380943. The reversal of 1118380919 is 9190838111.

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

It is a cyclic number.

It is not a de Polignac number, because 1118380919 - 2²⁰ = 1117332343 is a prime.

It is a super-2 number, since 2×1118380919² = 2501551759966569122, 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 (1118380909) 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, 373049 + ... + 376034.

It is an arithmetic number, because the mean of its divisors is an integer number (279782874).

Almost surely, 2^1118380919 is an apocalyptic number.

1118380919 is a deficient number, since it is larger than the sum of its proper divisors (750577).

1118380919 is an equidigital number, since it uses as much as digits as its factorization.

1118380919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750576.

The product of its (nonzero) digits is 15552, while the sum is 41.

The square root of 1118380919 is about 33442.2026637002. The cubic root of 1118380919 is about 1037.9981582924.

The spelling of 1118380919 in words is "one billion, one hundred eighteen million, three hundred eighty thousand, nine hundred nineteen".