82971806 has 4 divisors (see below), whose sum is σ = 124457712. Its totient is φ = 41485902.

The previous prime is 82971793. The next prime is 82971827. The reversal of 82971806 is 60817928.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20742950 + ... + 20742953.

It is an arithmetic number, because the mean of its divisors is an integer number (31114428).

Almost surely, 2^82971806 is an apocalyptic number.

82971806 is a deficient number, since it is larger than the sum of its proper divisors (41485906).

82971806 is a wasteful number, since it uses less digits than its factorization.

82971806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41485905.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 82971806 is about 9108.8861009456. The cubic root of 82971806 is about 436.1576702987.

The spelling of 82971806 in words is "eighty-two million, nine hundred seventy-one thousand, eight hundred six".