3965659 has 2 divisors, whose sum is σ = 3965660. Its totient is φ = 3965658.

The previous prime is 3965653. The next prime is 3965681. The reversal of 3965659 is 9565693.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3965659 - 2⁹ = 3965147 is a prime.

It is a d-powerful number, because it can be written as 3³ + 9² + 6² + 5⁹ + 6³ + 5⁹ + 9⁵ .

It is not a weakly prime, because it can be changed into another prime (3965653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982829 + 1982830.

It is an arithmetic number, because the mean of its divisors is an integer number (1982830).

Almost surely, 2^3965659 is an apocalyptic number.

3965659 is a deficient number, since it is larger than the sum of its proper divisors (1).

3965659 is an equidigital number, since it uses as much as digits as its factorization.

3965659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 43.

The square root of 3965659 is about 1991.3962438450. The cubic root of 3965659 is about 158.2845244445.

It can be divided in two parts, 3965 and 659, that added together give a square (4624 = 68²).

The spelling of 3965659 in words is "three million, nine hundred sixty-five thousand, six hundred fifty-nine".