3791971 has 4 divisors (see below), whose sum is σ = 3798432. Its totient is φ = 3785512.

The previous prime is 3791959. The next prime is 3791981. The reversal of 3791971 is 1791973.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3791971 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 3791971.

It is not an unprimeable number, because it can be changed into a prime (3791911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251 + ... + 3556.

It is an arithmetic number, because the mean of its divisors is an integer number (949608).

Almost surely, 2^3791971 is an apocalyptic number.

3791971 is a deficient number, since it is larger than the sum of its proper divisors (6461).

3791971 is an equidigital number, since it uses as much as digits as its factorization.

3791971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460.

The product of its digits is 11907, while the sum is 37.

The square root of 3791971 is about 1947.2983849426. The cubic root of 3791971 is about 155.9390924840.

The spelling of 3791971 in words is "three million, seven hundred ninety-one thousand, nine hundred seventy-one".