82711897 has 2 divisors, whose sum is σ = 82711898. Its totient is φ = 82711896.

The previous prime is 82711879. The next prime is 82711901. The reversal of 82711897 is 79811728.

It is a happy number.

Together with previous prime (82711879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82065481 + 646416 = 9059^2 + 804^2 .

It is a cyclic number.

It is not a de Polignac number, because 82711897 - 2¹¹ = 82709849 is a prime.

It is a super-3 number, since 3×82711897³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (82711877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41355948 + 41355949.

It is an arithmetic number, because the mean of its divisors is an integer number (41355949).

Almost surely, 2^82711897 is an apocalyptic number.

It is an amenable number.

82711897 is a deficient number, since it is larger than the sum of its proper divisors (1).

82711897 is an equidigital number, since it uses as much as digits as its factorization.

82711897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 43.

The square root of 82711897 is about 9094.6081278964. The cubic root of 82711897 is about 435.7017729530.

The spelling of 82711897 in words is "eighty-two million, seven hundred eleven thousand, eight hundred ninety-seven".