82191923 has 16 divisors (see below), whose sum is σ = 96741216. Its totient is φ = 68989440.

The previous prime is 82191913. The next prime is 82191947. The reversal of 82191923 is 32919128.

It is a cyclic number.

It is not a de Polignac number, because 82191923 - 2⁶ = 82191859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82191913) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 5765 + ... + 14057.

It is an arithmetic number, because the mean of its divisors is an integer number (6046326).

Almost surely, 2^82191923 is an apocalyptic number.

82191923 is a deficient number, since it is larger than the sum of its proper divisors (14549293).

82191923 is a wasteful number, since it uses less digits than its factorization.

82191923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8374.

The product of its digits is 7776, while the sum is 35.

The square root of 82191923 is about 9065.9761195362. The cubic root of 82191923 is about 434.7868299795.

The spelling of 82191923 in words is "eighty-two million, one hundred ninety-one thousand, nine hundred twenty-three".