3166391 has 4 divisors (see below), whose sum is σ = 3240072. Its totient is φ = 3092712.

The previous prime is 3166363. The next prime is 3166393. The reversal of 3166391 is 1936613.

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

It is a cyclic number.

It is not a de Polignac number, because 3166391 - 2¹⁰ = 3165367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3166393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36776 + ... + 36861.

It is an arithmetic number, because the mean of its divisors is an integer number (810018).

Almost surely, 2^3166391 is an apocalyptic number.

3166391 is a deficient number, since it is larger than the sum of its proper divisors (73681).

3166391 is an equidigital number, since it uses as much as digits as its factorization.

3166391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73680.

The product of its digits is 2916, while the sum is 29.

The square root of 3166391 is about 1779.4355846728. The cubic root of 3166391 is about 146.8435406290.

The spelling of 3166391 in words is "three million, one hundred sixty-six thousand, three hundred ninety-one".