3909623 has 4 divisors (see below), whose sum is σ = 3914400. Its totient is φ = 3904848.

The previous prime is 3909617. The next prime is 3909641. The reversal of 3909623 is 3269093.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3269093 = 53 ⋅61681.

It is a cyclic number.

It is not a de Polignac number, because 3909623 - 2⁶ = 3909559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3909623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909613) 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, 815 + ... + 2912.

It is an arithmetic number, because the mean of its divisors is an integer number (978600).

Almost surely, 2^3909623 is an apocalyptic number.

3909623 is a deficient number, since it is larger than the sum of its proper divisors (4777).

3909623 is a wasteful number, since it uses less digits than its factorization.

3909623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 3909623 is about 1977.2766624830. The cubic root of 3909623 is about 157.5354484752.

The spelling of 3909623 in words is "three million, nine hundred nine thousand, six hundred twenty-three".