2118394 has 4 divisors (see below), whose sum is σ = 3177594. Its totient is φ = 1059196.

The previous prime is 2118377. The next prime is 2118397. The reversal of 2118394 is 4938112.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 1369 = 1455^2 + 37^2 .

It is not an unprimeable number, because it can be changed into a prime (2118397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 529597 + ... + 529600.

2^2118394 is an apocalyptic number.

2118394 is a deficient number, since it is larger than the sum of its proper divisors (1059200).

2118394 is a wasteful number, since it uses less digits than its factorization.

2118394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059199.

The product of its digits is 1728, while the sum is 28.

The square root of 2118394 is about 1455.4703707049. The cubic root of 2118394 is about 128.4307186072.

The spelling of 2118394 in words is "two million, one hundred eighteen thousand, three hundred ninety-four".