3581689 has 2 divisors, whose sum is σ = 3581690. Its totient is φ = 3581688.

The previous prime is 3581681. The next prime is 3581693. The reversal of 3581689 is 9861853.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3579664 + 2025 = 1892^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 3581689 - 2³ = 3581681 is a prime.

It is not a weakly prime, because it can be changed into another prime (3581681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1790844 + 1790845.

It is an arithmetic number, because the mean of its divisors is an integer number (1790845).

Almost surely, 2^3581689 is an apocalyptic number.

It is an amenable number.

3581689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3581689 is an equidigital number, since it uses as much as digits as its factorization.

3581689 is an evil number, because the sum of its binary digits is even.

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

The square root of 3581689 is about 1892.5350723302. The cubic root of 3581689 is about 153.0015948116.

The spelling of 3581689 in words is "three million, five hundred eighty-one thousand, six hundred eighty-nine".