3900065 has 16 divisors (see below), whose sum is σ = 5216400. Its totient is φ = 2779392.

The previous prime is 3899989. The next prime is 3900067. The reversal of 3900065 is 5600093.

It can be written as a sum of positive squares in 8 ways, for example, as 717409 + 3182656 = 847^2 + 1784^2 .

It is a cyclic number.

It is not a de Polignac number, because 3900065 - 2⁸ = 3899809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3900065.

It is not an unprimeable number, because it can be changed into a prime (3900067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 851 + ... + 2919.

It is an arithmetic number, because the mean of its divisors is an integer number (326025).

Almost surely, 2^3900065 is an apocalyptic number.

It is an amenable number.

3900065 is a deficient number, since it is larger than the sum of its proper divisors (1316335).

3900065 is a wasteful number, since it uses less digits than its factorization.

3900065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 3900065 is about 1974.8582227593. The cubic root of 3900065 is about 157.4069661366.

The spelling of 3900065 in words is "three million, nine hundred thousand, sixty-five".