82100099 has 4 divisors (see below), whose sum is σ = 82283400. Its totient is φ = 81916800.

The previous prime is 82100063. The next prime is 82100149. The reversal of 82100099 is 99000128.

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 82100099 - 2²⁴ = 65322883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82100009) 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, 90977 + ... + 91874.

It is an arithmetic number, because the mean of its divisors is an integer number (20570850).

Almost surely, 2^82100099 is an apocalyptic number.

82100099 is a deficient number, since it is larger than the sum of its proper divisors (183301).

82100099 is a wasteful number, since it uses less digits than its factorization.

82100099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183300.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 82100099 is about 9060.9104950882. The cubic root of 82100099 is about 434.6248564701.

Adding to 82100099 its sum of digits (29), we get a palindrome (82100128).

The spelling of 82100099 in words is "eighty-two million, one hundred thousand, ninety-nine".