82697871 has 4 divisors (see below), whose sum is σ = 110263832. Its totient is φ = 55131912.

The previous prime is 82697789. The next prime is 82697897. The reversal of 82697871 is 17879628.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 82697871 - 2¹⁰ = 82696847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82697871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82697071) 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, 13782976 + ... + 13782981.

It is an arithmetic number, because the mean of its divisors is an integer number (27565958).

Almost surely, 2^82697871 is an apocalyptic number.

82697871 is a deficient number, since it is larger than the sum of its proper divisors (27565961).

82697871 is a wasteful number, since it uses less digits than its factorization.

82697871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27565960.

The product of its digits is 338688, while the sum is 48.

The square root of 82697871 is about 9093.8369789655. The cubic root of 82697871 is about 435.6771432897.

The spelling of 82697871 in words is "eighty-two million, six hundred ninety-seven thousand, eight hundred seventy-one".