82019101 has 4 divisors (see below), whose sum is σ = 86843772. Its totient is φ = 77194432.

The previous prime is 82019099. The next prime is 82019111. The reversal of 82019101 is 10191028.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23863225 + 58155876 = 4885^2 + 7626^2 .

It is a cyclic number.

It is not a de Polignac number, because 82019101 - 2¹ = 82019099 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 (82019111) 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 3 ways as a sum of consecutive naturals, for example, 2412310 + ... + 2412343.

It is an arithmetic number, because the mean of its divisors is an integer number (21710943).

Almost surely, 2^82019101 is an apocalyptic number.

It is an amenable number.

82019101 is a deficient number, since it is larger than the sum of its proper divisors (4824671).

82019101 is a wasteful number, since it uses less digits than its factorization.

82019101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824670.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 82019101 is about 9056.4397530155. The cubic root of 82019101 is about 434.4818792672.

The spelling of 82019101 in words is "eighty-two million, nineteen thousand, one hundred one".