82071697 has 4 divisors (see below), whose sum is σ = 86391280. Its totient is φ = 77752116.

The previous prime is 82071673. The next prime is 82071701. The reversal of 82071697 is 79617028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82071697 - 2⁷ = 82071569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82071607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2159763 + ... + 2159800.

It is an arithmetic number, because the mean of its divisors is an integer number (21597820).

Almost surely, 2^82071697 is an apocalyptic number.

It is an amenable number.

82071697 is a deficient number, since it is larger than the sum of its proper divisors (4319583).

82071697 is a wasteful number, since it uses less digits than its factorization.

82071697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319582.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 82071697 is about 9059.3430777292. The cubic root of 82071697 is about 434.5747321338.

The spelling of 82071697 in words is "eighty-two million, seventy-one thousand, six hundred ninety-seven".