82072823 has 4 divisors (see below), whose sum is σ = 93797520. Its totient is φ = 70348128.

The previous prime is 82072819. The next prime is 82072831. The reversal of 82072823 is 32827028.

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

It is a cyclic number.

It is not a de Polignac number, because 82072823 - 2² = 82072819 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 82072823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82072843) 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, 5862338 + ... + 5862351.

It is an arithmetic number, because the mean of its divisors is an integer number (23449380).

Almost surely, 2^82072823 is an apocalyptic number.

82072823 is a deficient number, since it is larger than the sum of its proper divisors (11724697).

82072823 is a wasteful number, since it uses less digits than its factorization.

82072823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11724696.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 82072823 is about 9059.4052233025. The cubic root of 82072823 is about 434.5767195380.

The spelling of 82072823 in words is "eighty-two million, seventy-two thousand, eight hundred twenty-three".