7964989 has 4 divisors (see below), whose sum is σ = 7982656. Its totient is φ = 7947324.

The previous prime is 7964987. The next prime is 7965007. The reversal of 7964989 is 9894697.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7964989 - 2¹ = 7964987 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 (7964981) 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, 8139 + ... + 9064.

It is an arithmetic number, because the mean of its divisors is an integer number (1995664).

Almost surely, 2^7964989 is an apocalyptic number.

It is an amenable number.

7964989 is a deficient number, since it is larger than the sum of its proper divisors (17667).

7964989 is a wasteful number, since it uses less digits than its factorization.

7964989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17666.

The product of its digits is 979776, while the sum is 52.

The square root of 7964989 is about 2822.2312095220. The cubic root of 7964989 is about 199.7078150142.

The spelling of 7964989 in words is "seven million, nine hundred sixty-four thousand, nine hundred eighty-nine".