82404449 has 4 divisors (see below), whose sum is σ = 82668036. Its totient is φ = 82140864.

The previous prime is 82404437. The next prime is 82404503. The reversal of 82404449 is 94440428.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4700224 + 77704225 = 2168^2 + 8815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82404449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82404149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131324 + ... + 131949.

It is an arithmetic number, because the mean of its divisors is an integer number (20667009).

Almost surely, 2^82404449 is an apocalyptic number.

It is an amenable number.

82404449 is a deficient number, since it is larger than the sum of its proper divisors (263587).

82404449 is a wasteful number, since it uses less digits than its factorization.

82404449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263586.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 82404449 is about 9077.6896289750. The cubic root of 82404449 is about 435.1612543479.

The spelling of 82404449 in words is "eighty-two million, four hundred four thousand, four hundred forty-nine".