7904089 has 4 divisors (see below), whose sum is σ = 7947940. Its totient is φ = 7860240.

The previous prime is 7904087. The next prime is 7904093. The reversal of 7904089 is 9804097.

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 1247689 + 6656400 = 1117^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 7904089 - 2¹ = 7904087 is a prime.

It is a Duffinian number.

7904089 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7904087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21654 + ... + 22015.

It is an arithmetic number, because the mean of its divisors is an integer number (1986985).

Almost surely, 2^7904089 is an apocalyptic number.

It is an amenable number.

7904089 is a deficient number, since it is larger than the sum of its proper divisors (43851).

7904089 is a wasteful number, since it uses less digits than its factorization.

7904089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43850.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 7904089 is about 2811.4211708671. The cubic root of 7904089 is about 199.1975261517.

The spelling of 7904089 in words is "seven million, nine hundred four thousand, eighty-nine".