82805091 has 8 divisors (see below), whose sum is σ = 110535360. Its totient is φ = 55139112.

The previous prime is 82805087. The next prime is 82805101. The reversal of 82805091 is 19050828.

It is a happy number.

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

It is not a de Polignac number, because 82805091 - 2² = 82805087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82805081) 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, 12981 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (13816920).

Almost surely, 2^82805091 is an apocalyptic number.

82805091 is a deficient number, since it is larger than the sum of its proper divisors (27730269).

82805091 is a wasteful number, since it uses less digits than its factorization.

82805091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32145.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 82805091 is about 9099.7302707278. The cubic root of 82805091 is about 435.8653509945.

The spelling of 82805091 in words is "eighty-two million, eight hundred five thousand, ninety-one".