2167091 has 2 divisors, whose sum is σ = 2167092. Its totient is φ = 2167090.

The previous prime is 2167079. The next prime is 2167093. The reversal of 2167091 is 1907612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2167091 is a prime.

Together with 2167093, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2167091.

It is not a weakly prime, because it can be changed into another prime (2167093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083545 + 1083546.

It is an arithmetic number, because the mean of its divisors is an integer number (1083546).

2^2167091 is an apocalyptic number.

2167091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2167091 is an equidigital number, since it uses as much as digits as its factorization.

2167091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 2167091 is about 1472.1042761979. The cubic root of 2167091 is about 129.4073814874.

The spelling of 2167091 in words is "two million, one hundred sixty-seven thousand, ninety-one".