2193791 has 2 divisors, whose sum is σ = 2193792. Its totient is φ = 2193790.

The previous prime is 2193769. The next prime is 2193803. The reversal of 2193791 is 1973912.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2193791 - 2¹⁸ = 1931647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2193701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096895 + 1096896.

It is an arithmetic number, because the mean of its divisors is an integer number (1096896).

2^2193791 is an apocalyptic number.

2193791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193791 is an equidigital number, since it uses as much as digits as its factorization.

2193791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 32.

The square root of 2193791 is about 1481.1451650665. The cubic root of 2193791 is about 129.9366752731.

The spelling of 2193791 in words is "two million, one hundred ninety-three thousand, seven hundred ninety-one".