7898689 has 4 divisors (see below), whose sum is σ = 7923924. Its totient is φ = 7873456.

The previous prime is 7898687. The next prime is 7898731. The reversal of 7898689 is 9868987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9868987 = 41 ⋅240707.

It can be written as a sum of positive squares in 2 ways, for example, as 2585664 + 5313025 = 1608^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 7898689 - 2¹ = 7898687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7898687) 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, 12142 + ... + 12775.

It is an arithmetic number, because the mean of its divisors is an integer number (1980981).

Almost surely, 2^7898689 is an apocalyptic number.

It is an amenable number.

7898689 is a deficient number, since it is larger than the sum of its proper divisors (25235).

7898689 is a wasteful number, since it uses less digits than its factorization.

7898689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25234.

The product of its digits is 1741824, while the sum is 55.

The square root of 7898689 is about 2810.4606384008. The cubic root of 7898689 is about 199.1521525188.

The spelling of 7898689 in words is "seven million, eight hundred ninety-eight thousand, six hundred eighty-nine".