82545109 has 2 divisors, whose sum is σ = 82545110. Its totient is φ = 82545108.

The previous prime is 82545083. The next prime is 82545119. The reversal of 82545109 is 90154528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70140625 + 12404484 = 8375^2 + 3522^2 .

It is a cyclic number.

It is not a de Polignac number, because 82545109 - 2⁷ = 82544981 is a prime.

It is equal to p_4809256 and since 82545109 and 4809256 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82545119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41272554 + 41272555.

It is an arithmetic number, because the mean of its divisors is an integer number (41272555).

Almost surely, 2^82545109 is an apocalyptic number.

It is an amenable number.

82545109 is a deficient number, since it is larger than the sum of its proper divisors (1).

82545109 is an equidigital number, since it uses as much as digits as its factorization.

82545109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 82545109 is about 9085.4338916752. The cubic root of 82545109 is about 435.4087126202.

The spelling of 82545109 in words is "eighty-two million, five hundred forty-five thousand, one hundred nine".