7698989 has 4 divisors (see below), whose sum is σ = 7755324. Its totient is φ = 7642656.

The previous prime is 7698973. The next prime is 7698991. The reversal of 7698989 is 9898967.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9898967 = 13 ⋅761459.

It can be written as a sum of positive squares in 2 ways, for example, as 1612900 + 6086089 = 1270^2 + 2467^2 .

It is a cyclic number.

It is not a de Polignac number, because 7698989 - 2⁴ = 7698973 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7698289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27962 + ... + 28235.

It is an arithmetic number, because the mean of its divisors is an integer number (1938831).

Almost surely, 2^7698989 is an apocalyptic number.

It is an amenable number.

7698989 is a deficient number, since it is larger than the sum of its proper divisors (56335).

7698989 is a wasteful number, since it uses less digits than its factorization.

7698989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56334.

The product of its digits is 1959552, while the sum is 56.

The square root of 7698989 is about 2774.7052095673. The cubic root of 7698989 is about 197.4594394087.

The spelling of 7698989 in words is "seven million, six hundred ninety-eight thousand, nine hundred eighty-nine".