2040191 has 2 divisors, whose sum is σ = 2040192. Its totient is φ = 2040190.

The previous prime is 2040173. The next prime is 2040193. The reversal of 2040191 is 1910402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2040191 is a prime.

Together with 2040193, 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 (2040193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020095 + 1020096.

It is an arithmetic number, because the mean of its divisors is an integer number (1020096).

2^2040191 is an apocalyptic number.

2040191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040191 is an equidigital number, since it uses as much as digits as its factorization.

2040191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2040191 is about 1428.3525475176. The cubic root of 2040191 is about 126.8304721319.

Adding to 2040191 its reverse (1910402), we get a palindrome (3950593).

The spelling of 2040191 in words is "two million, forty thousand, one hundred ninety-one".