1118217905 has 8 divisors (see below), whose sum is σ = 1533556032. Its totient is φ = 766777968.

The previous prime is 1118217883. The next prime is 1118217911. The reversal of 1118217905 is 5097128111.

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

It is a cyclic number.

It is not a de Polignac number, because 1118217905 - 2¹⁰ = 1118216881 is a prime.

It is a super-2 number, since 2×1118217905² = 2500822566125178050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 31949083 = 1118217905 / (1 + 1 + 1 + 8 + 2 + 1 + 7 + 9 + 0 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15974507 + ... + 15974576.

It is an arithmetic number, because the mean of its divisors is an integer number (191694504).

Almost surely, 2^1118217905 is an apocalyptic number.

It is an amenable number.

1118217905 is a deficient number, since it is larger than the sum of its proper divisors (415338127).

1118217905 is an equidigital number, since it uses as much as digits as its factorization.

1118217905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31949095.

The product of its (nonzero) digits is 5040, while the sum is 35.

The square root of 1118217905 is about 33439.7653251335. The cubic root of 1118217905 is about 1037.9477233434.

The spelling of 1118217905 in words is "one billion, one hundred eighteen million, two hundred seventeen thousand, nine hundred five".