1818949 has 16 divisors (see below), whose sum is σ = 2146176. Its totient is φ = 1523200.

The previous prime is 1818937. The next prime is 1818977. The reversal of 1818949 is 9498181.

It is not a de Polignac number, because 1818949 - 2⁹ = 1818437 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13209 + ... + 13345.

It is an arithmetic number, because the mean of its divisors is an integer number (134136).

2^1818949 is an apocalyptic number.

It is an amenable number.

1818949 is a deficient number, since it is larger than the sum of its proper divisors (327227).

1818949 is a wasteful number, since it uses less digits than its factorization.

1818949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236.

The product of its digits is 20736, while the sum is 40.

The square root of 1818949 is about 1348.6841735558. The cubic root of 1818949 is about 122.0694086813.

The spelling of 1818949 in words is "one million, eight hundred eighteen thousand, nine hundred forty-nine".