7687989 has 12 divisors (see below), whose sum is σ = 11689600. Its totient is φ = 4855464.

The previous prime is 7687963. The next prime is 7687991. The reversal of 7687989 is 9897867.

It is not a de Polignac number, because 7687989 - 2⁷ = 7687861 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 (7687919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22309 + ... + 22650.

Almost surely, 2^7687989 is an apocalyptic number.

It is an amenable number.

7687989 is a deficient number, since it is larger than the sum of its proper divisors (4001611).

7687989 is a wasteful number, since it uses less digits than its factorization.

7687989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44984 (or 44981 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 7687989 is about 2772.7223084903. The cubic root of 7687989 is about 197.3653539341.

The spelling of 7687989 in words is "seven million, six hundred eighty-seven thousand, nine hundred eighty-nine".