1918099 has 4 divisors (see below), whose sum is σ = 1922040. Its totient is φ = 1914160.

The previous prime is 1918097. The next prime is 1918121. The reversal of 1918099 is 9908191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9908191 = 53 ⋅186947.

It is a cyclic number.

It is not a de Polignac number, because 1918099 - 2¹ = 1918097 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 3 ways as a sum of consecutive naturals, for example, 1117 + ... + 2254.

It is an arithmetic number, because the mean of its divisors is an integer number (480510).

2^1918099 is an apocalyptic number.

1918099 is a deficient number, since it is larger than the sum of its proper divisors (3941).

1918099 is an equidigital number, since it uses as much as digits as its factorization.

1918099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 1918099 is about 1384.9545118884. The cubic root of 1918099 is about 124.2482669081.

The spelling of 1918099 in words is "one million, nine hundred eighteen thousand, ninety-nine".