7989005 has 4 divisors (see below), whose sum is σ = 9586812. Its totient is φ = 6391200.

The previous prime is 7988993. The next prime is 7989011. The reversal of 7989005 is 5009897.

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 5851561 + 2137444 = 2419^2 + 1462^2 .

It is not a de Polignac number, because 7989005 - 2⁸ = 7988749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7989005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798896 + ... + 798905.

It is an arithmetic number, because the mean of its divisors is an integer number (2396703).

Almost surely, 2^7989005 is an apocalyptic number.

It is an amenable number.

7989005 is a deficient number, since it is larger than the sum of its proper divisors (1597807).

7989005 is a wasteful number, since it uses less digits than its factorization.

7989005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597806.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 7989005 is about 2826.4827966927. The cubic root of 7989005 is about 199.9083329922.

The spelling of 7989005 in words is "seven million, nine hundred eighty-nine thousand, five".