3966791 has 8 divisors (see below), whose sum is σ = 4195968. Its totient is φ = 3744000.

The previous prime is 3966779. The next prime is 3966799. The reversal of 3966791 is 1976693.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3966791 - 2⁶ = 3966727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966799) 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, 290 + ... + 2831.

It is an arithmetic number, because the mean of its divisors is an integer number (524496).

Almost surely, 2^3966791 is an apocalyptic number.

3966791 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3966791 is a deficient number, since it is larger than the sum of its proper divisors (229177).

3966791 is a wasteful number, since it uses less digits than its factorization.

3966791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193.

The product of its digits is 61236, while the sum is 41.

The square root of 3966791 is about 1991.6804462564. The cubic root of 3966791 is about 158.2995838193.

The spelling of 3966791 in words is "three million, nine hundred sixty-six thousand, seven hundred ninety-one".