82420823 has 4 divisors (see below), whose sum is σ = 82765920. Its totient is φ = 82075728.

The previous prime is 82420771. The next prime is 82420829. The reversal of 82420823 is 32802428.

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 82420823 - 2⁶ = 82420759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82420829) 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, 172190 + ... + 172667.

It is an arithmetic number, because the mean of its divisors is an integer number (20691480).

Almost surely, 2^82420823 is an apocalyptic number.

82420823 is a deficient number, since it is larger than the sum of its proper divisors (345097).

82420823 is a wasteful number, since it uses less digits than its factorization.

82420823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345096.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 82420823 is about 9078.5914656405. The cubic root of 82420823 is about 435.1900750349.

The spelling of 82420823 in words is "eighty-two million, four hundred twenty thousand, eight hundred twenty-three".