3969629 has 2 divisors, whose sum is σ = 3969630. Its totient is φ = 3969628.

The previous prime is 3969611. The next prime is 3969649. The reversal of 3969629 is 9269693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2647129 + 1322500 = 1627^2 + 1150^2 .

It is an emirp because it is prime and its reverse (9269693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3969629 - 2²⁰ = 2921053 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3969629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3969649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1984814 + 1984815.

It is an arithmetic number, because the mean of its divisors is an integer number (1984815).

Almost surely, 2^3969629 is an apocalyptic number.

It is an amenable number.

3969629 is a deficient number, since it is larger than the sum of its proper divisors (1).

3969629 is an equidigital number, since it uses as much as digits as its factorization.

3969629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 44.

The square root of 3969629 is about 1992.3927825607. The cubic root of 3969629 is about 158.3373260920.

The spelling of 3969629 in words is "three million, nine hundred sixty-nine thousand, six hundred twenty-nine".