2091597061 has 2 divisors, whose sum is σ = 2091597062. Its totient is φ = 2091597060.

The previous prime is 2091597043. The next prime is 2091597103. The reversal of 2091597061 is 1607951902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1935472036 + 156125025 = 43994^2 + 12495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091597061 - 2⁵ = 2091597029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091597031) 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, 1045798530 + 1045798531.

It is an arithmetic number, because the mean of its divisors is an integer number (1045798531).

Almost surely, 2^2091597061 is an apocalyptic number.

It is an amenable number.

2091597061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091597061 is an equidigital number, since it uses as much as digits as its factorization.

2091597061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 2091597061 is about 45733.9814689253. The cubic root of 2091597061 is about 1278.8688454440.

The spelling of 2091597061 in words is "two billion, ninety-one million, five hundred ninety-seven thousand, sixty-one".