3840689 has 2 divisors, whose sum is σ = 3840690. Its totient is φ = 3840688.

The previous prime is 3840671. The next prime is 3840703. The reversal of 3840689 is 9860483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3045025 + 795664 = 1745^2 + 892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3840689 is a prime.

It is not a weakly prime, because it can be changed into another prime (3840649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1920344 + 1920345.

It is an arithmetic number, because the mean of its divisors is an integer number (1920345).

Almost surely, 2^3840689 is an apocalyptic number.

It is an amenable number.

3840689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3840689 is an equidigital number, since it uses as much as digits as its factorization.

3840689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 3840689 is about 1959.7675882614. The cubic root of 3840689 is about 156.6040708638.

The spelling of 3840689 in words is "three million, eight hundred forty thousand, six hundred eighty-nine".