8195720279 has 2 divisors, whose sum is σ = 8195720280. Its totient is φ = 8195720278.

The previous prime is 8195720251. The next prime is 8195720287. The reversal of 8195720279 is 9720275918.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8195720279 - 2²⁰ = 8194671703 is a prime.

It is a super-2 number, since 2×8195720279² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8195728279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4097860139 + 4097860140.

It is an arithmetic number, because the mean of its divisors is an integer number (4097860140).

Almost surely, 2^8195720279 is an apocalyptic number.

8195720279 is a deficient number, since it is larger than the sum of its proper divisors (1).

8195720279 is an equidigital number, since it uses as much as digits as its factorization.

8195720279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 8195720279 is about 90530.2174911780. The cubic root of 8195720279 is about 2016.1787936633.

The spelling of 8195720279 in words is "eight billion, one hundred ninety-five million, seven hundred twenty thousand, two hundred seventy-nine".