82406689 has 2 divisors, whose sum is σ = 82406690. Its totient is φ = 82406688.

The previous prime is 82406609. The next prime is 82406693. The reversal of 82406689 is 98660428.

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., 72846225 + 9560464 = 8535^2 + 3092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82406689 is a prime.

It is not a weakly prime, because it can be changed into another prime (82406609) 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, 41203344 + 41203345.

It is an arithmetic number, because the mean of its divisors is an integer number (41203345).

Almost surely, 2^82406689 is an apocalyptic number.

It is an amenable number.

82406689 is a deficient number, since it is larger than the sum of its proper divisors (1).

82406689 is an equidigital number, since it uses as much as digits as its factorization.

82406689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 82406689 is about 9077.8130075476. The cubic root of 82406689 is about 435.1651973080.

The spelling of 82406689 in words is "eighty-two million, four hundred six thousand, six hundred eighty-nine".