7969989 has 4 divisors (see below), whose sum is σ = 10626656. Its totient is φ = 5313324.

The previous prime is 7969979. The next prime is 7969993. The reversal of 7969989 is 9899697.

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 not a de Polignac number, because 7969989 - 2¹¹ = 7967941 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 7⁸ + 9⁶ + 6⁶ + 9⁶ + 9⁶ + 8⁵ + 9⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7969979) 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, 1328329 + ... + 1328334.

It is an arithmetic number, because the mean of its divisors is an integer number (2656664).

Almost surely, 2^7969989 is an apocalyptic number.

It is an amenable number.

7969989 is a deficient number, since it is larger than the sum of its proper divisors (2656667).

7969989 is a wasteful number, since it uses less digits than its factorization.

7969989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656666.

The product of its digits is 2204496, while the sum is 57.

The square root of 7969989 is about 2823.1168944980. The cubic root of 7969989 is about 199.7495949507.

The spelling of 7969989 in words is "seven million, nine hundred sixty-nine thousand, nine hundred eighty-nine".