2077891 has 2 divisors, whose sum is σ = 2077892. Its totient is φ = 2077890.

The previous prime is 2077861. The next prime is 2077909. The reversal of 2077891 is 1987702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2077891 is a prime.

2077891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2077811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1038945 + 1038946.

It is an arithmetic number, because the mean of its divisors is an integer number (1038946).

2^2077891 is an apocalyptic number.

2077891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2077891 is an equidigital number, since it uses as much as digits as its factorization.

2077891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2077891 is about 1441.4891605558. The cubic root of 2077891 is about 127.6069281131.

The spelling of 2077891 in words is "two million, seventy-seven thousand, eight hundred ninety-one".