82720833 has 16 divisors (see below), whose sum is σ = 119171136. Its totient is φ = 50736960.

The previous prime is 82720831. The next prime is 82720837. The reversal of 82720833 is 33802728.

It is a happy number.

It is not a de Polignac number, because 82720833 - 2¹ = 82720831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82720794 and 82720803.

It is not an unprimeable number, because it can be changed into a prime (82720831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9018 + ... + 15708.

It is an arithmetic number, because the mean of its divisors is an integer number (7448196).

Almost surely, 2^82720833 is an apocalyptic number.

It is an amenable number.

82720833 is a deficient number, since it is larger than the sum of its proper divisors (36450303).

82720833 is a wasteful number, since it uses less digits than its factorization.

82720833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7024.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 82720833 is about 9095.0993947290. The cubic root of 82720833 is about 435.7174631217.

The spelling of 82720833 in words is "eighty-two million, seven hundred twenty thousand, eight hundred thirty-three".