8195720287 has 2 divisors, whose sum is σ = 8195720288. Its totient is φ = 8195720286.

The previous prime is 8195720279. The next prime is 8195720311. The reversal of 8195720287 is 7820275918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8195720287 - 2³ = 8195720279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8195720287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8195720227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4097860143 + 4097860144.

It is an arithmetic number, because the mean of its divisors is an integer number (4097860144).

Almost surely, 2^8195720287 is an apocalyptic number.

8195720287 is a deficient number, since it is larger than the sum of its proper divisors (1).

8195720287 is an equidigital number, since it uses as much as digits as its factorization.

8195720287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 8195720287 is about 90530.2175353622. The cubic root of 8195720287 is about 2016.1787943193.

The spelling of 8195720287 in words is "eight billion, one hundred ninety-five million, seven hundred twenty thousand, two hundred eighty-seven".