3945369 has 12 divisors (see below), whose sum is σ = 5553456. Its totient is φ = 2491128.

The previous prime is 3945367. The next prime is 3945391. The reversal of 3945369 is 9635493.

It is not a de Polignac number, because 3945369 - 2¹ = 3945367 is a prime.

It is a super-2 number, since 2×3945369² = 31131873092322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3945367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 739 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (462788).

Almost surely, 2^3945369 is an apocalyptic number.

It is an amenable number.

3945369 is a deficient number, since it is larger than the sum of its proper divisors (1608087).

3945369 is a wasteful number, since it uses less digits than its factorization.

3945369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684 (or 3665 counting only the distinct ones).

The product of its digits is 87480, while the sum is 39.

The square root of 3945369 is about 1986.2952952670. The cubic root of 3945369 is about 158.0141123965.

The spelling of 3945369 in words is "three million, nine hundred forty-five thousand, three hundred sixty-nine".