82813289 has 8 divisors (see below), whose sum is σ = 91594440. Its totient is φ = 74376576.

The previous prime is 82813277. The next prime is 82813303. The reversal of 82813289 is 98231828.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36096064 + 46717225 = 6008^2 + 6835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82813289 - 2²⁴ = 66036073 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 (82813219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85604 + ... + 86565.

It is an arithmetic number, because the mean of its divisors is an integer number (11449305).

Almost surely, 2^82813289 is an apocalyptic number.

It is an amenable number.

82813289 is a deficient number, since it is larger than the sum of its proper divisors (8781151).

82813289 is a wasteful number, since it uses less digits than its factorization.

82813289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172219.

The product of its digits is 55296, while the sum is 41.

The square root of 82813289 is about 9100.1807124914. The cubic root of 82813289 is about 435.8797345957.

The spelling of 82813289 in words is "eighty-two million, eight hundred thirteen thousand, two hundred eighty-nine".