2191027 has 2 divisors, whose sum is σ = 2191028. Its totient is φ = 2191026.

The previous prime is 2191019. The next prime is 2191031. The reversal of 2191027 is 7201912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2191027 - 2³ = 2191019 is a prime.

2191027 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2190989 and 2191007.

It is not a weakly prime, because it can be changed into another prime (2191067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095513 + 1095514.

It is an arithmetic number, because the mean of its divisors is an integer number (1095514).

2^2191027 is an apocalyptic number.

2191027 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191027 is an equidigital number, since it uses as much as digits as its factorization.

2191027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2191027 is about 1480.2118091679. The cubic root of 2191027 is about 129.8820824233.

Adding to 2191027 its reverse (7201912), we get a palindrome (9392939).

The spelling of 2191027 in words is "two million, one hundred ninety-one thousand, twenty-seven".