4491191 has 2 divisors, whose sum is σ = 4491192. Its totient is φ = 4491190.

The previous prime is 4491173. The next prime is 4491203. The reversal of 4491191 is 1911944.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4491191 - 2¹⁴ = 4474807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4491121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2245595 + 2245596.

It is an arithmetic number, because the mean of its divisors is an integer number (2245596).

Almost surely, 2^4491191 is an apocalyptic number.

4491191 is a deficient number, since it is larger than the sum of its proper divisors (1).

4491191 is an equidigital number, since it uses as much as digits as its factorization.

4491191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 4491191 is about 2119.2430252333. The cubic root of 4491191 is about 164.9885636396.

The spelling of 4491191 in words is "four million, four hundred ninety-one thousand, one hundred ninety-one".