7639989 has 8 divisors (see below), whose sum is σ = 11641920. Its totient is φ = 4365696.

The previous prime is 7639927. The next prime is 7639993. The reversal of 7639989 is 9899367.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7639989 - 2¹¹ = 7637941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7639999) 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 7 ways as a sum of consecutive naturals, for example, 181884 + ... + 181925.

It is an arithmetic number, because the mean of its divisors is an integer number (1455240).

Almost surely, 2^7639989 is an apocalyptic number.

It is an amenable number.

7639989 is a deficient number, since it is larger than the sum of its proper divisors (4001931).

7639989 is a wasteful number, since it uses less digits than its factorization.

7639989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363819.

The product of its digits is 734832, while the sum is 51.

The square root of 7639989 is about 2764.0530023862. The cubic root of 7639989 is about 196.9537455717.

The spelling of 7639989 in words is "seven million, six hundred thirty-nine thousand, nine hundred eighty-nine".