82100149 has 2 divisors, whose sum is σ = 82100150. Its totient is φ = 82100148.

The previous prime is 82100063. The next prime is 82100153. The reversal of 82100149 is 94100128.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77563249 + 4536900 = 8807^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 82100149 - 2⁹ = 82099637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82100749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41050074 + 41050075.

It is an arithmetic number, because the mean of its divisors is an integer number (41050075).

Almost surely, 2^82100149 is an apocalyptic number.

It is an amenable number.

82100149 is a deficient number, since it is larger than the sum of its proper divisors (1).

82100149 is an equidigital number, since it uses as much as digits as its factorization.

82100149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 82100149 is about 9060.9132541924. The cubic root of 82100149 is about 434.6249447008.

The spelling of 82100149 in words is "eighty-two million, one hundred thousand, one hundred forty-nine".