3158689 has 4 divisors (see below), whose sum is σ = 3186756. Its totient is φ = 3130624.

The previous prime is 3158671. The next prime is 3158713. The reversal of 3158689 is 9868513.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1638400 + 1520289 = 1280^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 3158689 - 2¹⁵ = 3125921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3158609) 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, 13864 + ... + 14089.

It is an arithmetic number, because the mean of its divisors is an integer number (796689).

Almost surely, 2^3158689 is an apocalyptic number.

It is an amenable number.

3158689 is a deficient number, since it is larger than the sum of its proper divisors (28067).

3158689 is a wasteful number, since it uses less digits than its factorization.

3158689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28066.

The product of its digits is 51840, while the sum is 40.

The square root of 3158689 is about 1777.2700976498. The cubic root of 3158689 is about 146.7243821290.

The spelling of 3158689 in words is "three million, one hundred fifty-eight thousand, six hundred eighty-nine".