3961791 has 20 divisors (see below), whose sum is σ = 6025800. Its totient is φ = 2593296.

The previous prime is 3961781. The next prime is 3961813. The reversal of 3961791 is 1971693.

3961791 is a `hidden beast` number, since 39 + 617 + 9 + 1 = 666.

It is not a de Polignac number, because 3961791 - 2⁵ = 3961759 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

3961791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4365 + ... + 5193.

It is an arithmetic number, because the mean of its divisors is an integer number (301290).

Almost surely, 2^3961791 is an apocalyptic number.

3961791 is a deficient number, since it is larger than the sum of its proper divisors (2064009).

3961791 is an equidigital number, since it uses as much as digits as its factorization.

3961791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 891 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 3961791 is about 1990.4248290252. The cubic root of 3961791 is about 158.2330455096.

It can be divided in two parts, 396 and 1791, that added together give a 7-th power (2187 = 3⁷).

The spelling of 3961791 in words is "three million, nine hundred sixty-one thousand, seven hundred ninety-one".