2920191 has 4 divisors (see below), whose sum is σ = 3893592. Its totient is φ = 1946792.

The previous prime is 2920187. The next prime is 2920193. The reversal of 2920191 is 1910292.

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 2920191 - 2² = 2920187 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2920193) 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, 486696 + ... + 486701.

It is an arithmetic number, because the mean of its divisors is an integer number (973398).

2^2920191 is an apocalyptic number.

2920191 is a deficient number, since it is larger than the sum of its proper divisors (973401).

2920191 is an equidigital number, since it uses as much as digits as its factorization.

2920191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973400.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 2920191 is about 1708.8566352974. The cubic root of 2920191 is about 142.9345063348.

It can be divided in two parts, 29201 and 91, that added together give a palindrome (29292).

The spelling of 2920191 in words is "two million, nine hundred twenty thousand, one hundred ninety-one".