3996791 has 2 divisors, whose sum is σ = 3996792. Its totient is φ = 3996790.

The previous prime is 3996763. The next prime is 3996793. The reversal of 3996791 is 1976993.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1976993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3996791 - 2¹⁴ = 3980407 is a prime.

Together with 3996793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3996793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998395 + 1998396.

It is an arithmetic number, because the mean of its divisors is an integer number (1998396).

Almost surely, 2^3996791 is an apocalyptic number.

3996791 is a deficient number, since it is larger than the sum of its proper divisors (1).

3996791 is an equidigital number, since it uses as much as digits as its factorization.

3996791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 44.

The square root of 3996791 is about 1999.1975890342. The cubic root of 3996791 is about 158.6976440902.

The spelling of 3996791 in words is "three million, nine hundred ninety-six thousand, seven hundred ninety-one".