82810091 has 16 divisors (see below), whose sum is σ = 103219200. Its totient is φ = 64685088.

The previous prime is 82810087. The next prime is 82810127. The reversal of 82810091 is 19001828.

It is not a de Polignac number, because 82810091 - 2² = 82810087 is a prime.

It is a super-2 number, since 2×82810091² = 13715022342856562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82810081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1430 + ... + 12948.

It is an arithmetic number, because the mean of its divisors is an integer number (6451200).

Almost surely, 2^82810091 is an apocalyptic number.

82810091 is a deficient number, since it is larger than the sum of its proper divisors (20409109).

82810091 is a wasteful number, since it uses less digits than its factorization.

82810091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11618.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 82810091 is about 9100.0049999986. The cubic root of 82810091 is about 435.8741237356.

The spelling of 82810091 in words is "eighty-two million, eight hundred ten thousand, ninety-one".