82719019 has 2 divisors, whose sum is σ = 82719020. Its totient is φ = 82719018.

The previous prime is 82719011. The next prime is 82719029. The reversal of 82719019 is 91091728.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82719019 - 2³ = 82719011 is a prime.

It is a super-2 number, since 2×82719019² = 13684872208644722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82719011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41359509 + 41359510.

It is an arithmetic number, because the mean of its divisors is an integer number (41359510).

Almost surely, 2^82719019 is an apocalyptic number.

82719019 is a deficient number, since it is larger than the sum of its proper divisors (1).

82719019 is an equidigital number, since it uses as much as digits as its factorization.

82719019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 82719019 is about 9094.9996701484. Note that the first 3 decimals coincide. The cubic root of 82719019 is about 435.7142781229.

The spelling of 82719019 in words is "eighty-two million, seven hundred nineteen thousand, nineteen".