3939569 has 2 divisors, whose sum is σ = 3939570. Its totient is φ = 3939568.

The previous prime is 3939541. The next prime is 3939589. The reversal of 3939569 is 9659393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 97969 = 1960^2 + 313^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3939569 is a prime.

It is a super-2 number, since 2×3939569² = 31040407811522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3939539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969784 + 1969785.

It is an arithmetic number, because the mean of its divisors is an integer number (1969785).

Almost surely, 2^3939569 is an apocalyptic number.

It is an amenable number.

3939569 is a deficient number, since it is larger than the sum of its proper divisors (1).

3939569 is an equidigital number, since it uses as much as digits as its factorization.

3939569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196830, while the sum is 44.

The square root of 3939569 is about 1984.8347538271. The cubic root of 3939569 is about 157.9366434010.

The spelling of 3939569 in words is "three million, nine hundred thirty-nine thousand, five hundred sixty-nine".