3923661 has 8 divisors (see below), whose sum is σ = 5978944. Its totient is φ = 2242080.

The previous prime is 3923653. The next prime is 3923669. The reversal of 3923661 is 1663293.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3923653) and next prime (3923669).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3923661 - 2³ = 3923653 is a prime.

It is a Duffinian number.

3923661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3923669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93400 + ... + 93441.

It is an arithmetic number, because the mean of its divisors is an integer number (747368).

Almost surely, 2^3923661 is an apocalyptic number.

It is an amenable number.

3923661 is a deficient number, since it is larger than the sum of its proper divisors (2055283).

3923661 is a wasteful number, since it uses less digits than its factorization.

3923661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186851.

The product of its digits is 5832, while the sum is 30.

The square root of 3923661 is about 1980.8233136754. The cubic root of 3923661 is about 157.7237736260.

The spelling of 3923661 in words is "three million, nine hundred twenty-three thousand, six hundred sixty-one".