2091195079 has 2 divisors, whose sum is σ = 2091195080. Its totient is φ = 2091195078.

The previous prime is 2091195031. The next prime is 2091195097. The reversal of 2091195079 is 9705911902.

Together with next prime (2091195097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2091195079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091195019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045597539 + 1045597540.

It is an arithmetic number, because the mean of its divisors is an integer number (1045597540).

Almost surely, 2^2091195079 is an apocalyptic number.

2091195079 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091195079 is an equidigital number, since it uses as much as digits as its factorization.

2091195079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 43.

The square root of 2091195079 is about 45729.5864730920. The cubic root of 2091195079 is about 1278.7869120094.

The spelling of 2091195079 in words is "two billion, ninety-one million, one hundred ninety-five thousand, seventy-nine".