82318791 has 8 divisors (see below), whose sum is σ = 113543280. Its totient is φ = 52986752.

The previous prime is 82318787. The next prime is 82318793. The reversal of 82318791 is 19781328.

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 82318791 - 2² = 82318787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82318793) 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 in 7 ways as a sum of consecutive naturals, for example, 473010 + ... + 473183.

It is an arithmetic number, because the mean of its divisors is an integer number (14192910).

Almost surely, 2^82318791 is an apocalyptic number.

82318791 is a deficient number, since it is larger than the sum of its proper divisors (31224489).

82318791 is a wasteful number, since it uses less digits than its factorization.

82318791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946225.

The product of its digits is 24192, while the sum is 39.

The square root of 82318791 is about 9072.9703515442. The cubic root of 82318791 is about 435.0104212063.

The spelling of 82318791 in words is "eighty-two million, three hundred eighteen thousand, seven hundred ninety-one".