1918093 has 6 divisors (see below), whose sum is σ = 2037866. Its totient is φ = 1804992.

The previous prime is 1918087. The next prime is 1918097. The reversal of 1918093 is 3908191.

It can be written as a sum of positive squares in 3 ways, for example, as 233289 + 1684804 = 483^2 + 1298^2 .

It is not a de Polignac number, because 1918093 - 2⁹ = 1917581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3030 + ... + 3607.

2^1918093 is an apocalyptic number.

It is an amenable number.

1918093 is a deficient number, since it is larger than the sum of its proper divisors (119773).

1918093 is an equidigital number, since it uses as much as digits as its factorization.

1918093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671 (or 6654 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1918093 is about 1384.9523457506. The cubic root of 1918093 is about 124.2481373544.

The spelling of 1918093 in words is "one million, nine hundred eighteen thousand, ninety-three".