3915689 has 2 divisors, whose sum is σ = 3915690. Its totient is φ = 3915688.

The previous prime is 3915683. The next prime is 3915697. The reversal of 3915689 is 9865193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 1605289 = 1520^2 + 1267^2 .

It is a cyclic number.

It is not a de Polignac number, because 3915689 - 2⁸ = 3915433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3915683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957844 + 1957845.

It is an arithmetic number, because the mean of its divisors is an integer number (1957845).

Almost surely, 2^3915689 is an apocalyptic number.

It is an amenable number.

3915689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3915689 is an equidigital number, since it uses as much as digits as its factorization.

3915689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 3915689 is about 1978.8099959319. The cubic root of 3915689 is about 157.6168814103.

The spelling of 3915689 in words is "three million, nine hundred fifteen thousand, six hundred eighty-nine".