2393989 has 4 divisors (see below), whose sum is σ = 2578156. Its totient is φ = 2209824.

The previous prime is 2393987. The next prime is 2394017. The reversal of 2393989 is 9893932.

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 2 ways, for example, as 917764 + 1476225 = 958^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2393989 - 2¹ = 2393987 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 (2393987) 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, 92064 + ... + 92089.

It is an arithmetic number, because the mean of its divisors is an integer number (644539).

2^2393989 is an apocalyptic number.

It is an amenable number.

2393989 is a deficient number, since it is larger than the sum of its proper divisors (184167).

2393989 is a wasteful number, since it uses less digits than its factorization.

2393989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184166.

The product of its digits is 104976, while the sum is 43.

The square root of 2393989 is about 1547.2520803024. The cubic root of 2393989 is about 133.7747198610.

The spelling of 2393989 in words is "two million, three hundred ninety-three thousand, nine hundred eighty-nine".