82123443 has 16 divisors (see below), whose sum is σ = 121804800. Its totient is φ = 54685800.

The previous prime is 82123439. The next prime is 82123471. The reversal of 82123443 is 34432128.

82123443 is a `hidden beast` number, since 8 + 212 + 3 + 443 = 666.

It is not a de Polignac number, because 82123443 - 2² = 82123439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (82123043) 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, 41118 + ... + 43068.

It is an arithmetic number, because the mean of its divisors is an integer number (7612800).

Almost surely, 2^82123443 is an apocalyptic number.

82123443 is a deficient number, since it is larger than the sum of its proper divisors (39681357).

82123443 is a wasteful number, since it uses less digits than its factorization.

82123443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519 (or 3513 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 82123443 is about 9062.1985742975. The cubic root of 82123443 is about 434.6660457066. Note that the first 3 decimals are identical.

The spelling of 82123443 in words is "eighty-two million, one hundred twenty-three thousand, four hundred forty-three".