2143795817 has 2 divisors, whose sum is σ = 2143795818. Its totient is φ = 2143795816.

The previous prime is 2143795807. The next prime is 2143795837. The reversal of 2143795817 is 7185973412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1965946921 + 177848896 = 44339^2 + 13336^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143795817 - 2⁸ = 2143795561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2143795807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071897908 + 1071897909.

It is an arithmetic number, because the mean of its divisors is an integer number (1071897909).

Almost surely, 2^2143795817 is an apocalyptic number.

It is an amenable number.

2143795817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143795817 is an equidigital number, since it uses as much as digits as its factorization.

2143795817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 2143795817 is about 46301.1427180799. The cubic root of 2143795817 is about 1289.4202103782.

The spelling of 2143795817 in words is "two billion, one hundred forty-three million, seven hundred ninety-five thousand, eight hundred seventeen".