82347409 has 2 divisors, whose sum is σ = 82347410. Its totient is φ = 82347408.

The previous prime is 82347403. The next prime is 82347457. The reversal of 82347409 is 90474328.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82301184 + 46225 = 9072^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 82347409 - 2³ = 82347401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82347401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41173704 + 41173705.

It is an arithmetic number, because the mean of its divisors is an integer number (41173705).

Almost surely, 2^82347409 is an apocalyptic number.

It is an amenable number.

82347409 is a deficient number, since it is larger than the sum of its proper divisors (1).

82347409 is an equidigital number, since it uses as much as digits as its factorization.

82347409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 82347409 is about 9074.5473165332. The cubic root of 82347409 is about 435.0608255984.

The spelling of 82347409 in words is "eighty-two million, three hundred forty-seven thousand, four hundred nine".