82080391 has 8 divisors (see below), whose sum is σ = 83326880. Its totient is φ = 80842752.

The previous prime is 82080367. The next prime is 82080407. The reversal of 82080391 is 19308028.

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 82080391 - 2⁵ = 82080359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82080311) 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, 17815 + ... + 21943.

It is an arithmetic number, because the mean of its divisors is an integer number (10415860).

Almost surely, 2^82080391 is an apocalyptic number.

82080391 is a deficient number, since it is larger than the sum of its proper divisors (1246489).

82080391 is a wasteful number, since it uses less digits than its factorization.

82080391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 82080391 is about 9059.8229011389. The cubic root of 82080391 is about 434.5900766820.

The spelling of 82080391 in words is "eighty-two million, eighty thousand, three hundred ninety-one".