82719985 has 8 divisors (see below), whose sum is σ = 99365760. Its totient is φ = 66108144.

The previous prime is 82719971. The next prime is 82720007. The reversal of 82719985 is 58991728.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82719985 - 2¹³ = 82711793 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2767 + ... + 13156.

It is an arithmetic number, because the mean of its divisors is an integer number (12420720).

Almost surely, 2^82719985 is an apocalyptic number.

It is an amenable number.

82719985 is a deficient number, since it is larger than the sum of its proper divisors (16645775).

82719985 is a wasteful number, since it uses less digits than its factorization.

82719985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16967.

The product of its digits is 362880, while the sum is 49.

The square root of 82719985 is about 9095.0527760976. The cubic root of 82719985 is about 435.7159742195.

The spelling of 82719985 in words is "eighty-two million, seven hundred nineteen thousand, nine hundred eighty-five".