2119995817 has 2 divisors, whose sum is σ = 2119995818. Its totient is φ = 2119995816.

The previous prime is 2119995811. The next prime is 2119995833. The reversal of 2119995817 is 7185999112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1515622761 + 604373056 = 38931^2 + 24584^2 .

It is a cyclic number.

It is not a de Polignac number, because 2119995817 - 2²⁷ = 1985778089 is a prime.

It is not a weakly prime, because it can be changed into another prime (2119995811) 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, 1059997908 + 1059997909.

It is an arithmetic number, because the mean of its divisors is an integer number (1059997909).

Almost surely, 2^2119995817 is an apocalyptic number.

It is an amenable number.

2119995817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2119995817 is an equidigital number, since it uses as much as digits as its factorization.

2119995817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 52.

The square root of 2119995817 is about 46043.4123083857. The cubic root of 2119995817 is about 1284.6308128040.

The spelling of 2119995817 in words is "two billion, one hundred nineteen million, nine hundred ninety-five thousand, eight hundred seventeen".