3909629 has 4 divisors (see below), whose sum is σ = 3917820. Its totient is φ = 3901440.

The previous prime is 3909617. The next prime is 3909641. The reversal of 3909629 is 9269093.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3909617) and next prime (3909641).

It can be written as a sum of positive squares in 2 ways, for example, as 2968729 + 940900 = 1723^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 3909629 - 2⁴ = 3909613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3909592 and 3909601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3332 + ... + 4349.

It is an arithmetic number, because the mean of its divisors is an integer number (979455).

Almost surely, 2^3909629 is an apocalyptic number.

It is an amenable number.

3909629 is a deficient number, since it is larger than the sum of its proper divisors (8191).

3909629 is an equidigital number, since it uses as much as digits as its factorization.

3909629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8190.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 3909629 is about 1977.2781797208. The cubic root of 3909629 is about 157.5355290637.

The spelling of 3909629 in words is "three million, nine hundred nine thousand, six hundred twenty-nine".