82388689 has 2 divisors, whose sum is σ = 82388690. Its totient is φ = 82388688.

The previous prime is 82388671. The next prime is 82388701. The reversal of 82388689 is 98688328.

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., 50296464 + 32092225 = 7092^2 + 5665^2 .

It is a cyclic number.

It is not a de Polignac number, because 82388689 - 2⁷ = 82388561 is a prime.

It is not a weakly prime, because it can be changed into another prime (82388489) 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 as a sum of consecutive naturals, namely, 41194344 + 41194345.

It is an arithmetic number, because the mean of its divisors is an integer number (41194345).

Almost surely, 2^82388689 is an apocalyptic number.

It is an amenable number.

82388689 is a deficient number, since it is larger than the sum of its proper divisors (1).

82388689 is an equidigital number, since it uses as much as digits as its factorization.

82388689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1327104, while the sum is 52.

The square root of 82388689 is about 9076.8215251816. The cubic root of 82388689 is about 435.1335107867.

The spelling of 82388689 in words is "eighty-two million, three hundred eighty-eight thousand, six hundred eighty-nine".