82909291 has 4 divisors (see below), whose sum is σ = 82931184. Its totient is φ = 82887400.

The previous prime is 82909279. The next prime is 82909301. The reversal of 82909291 is 19290928.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82909291 - 2⁵ = 82909259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82909241) 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 3 ways as a sum of consecutive naturals, for example, 3640 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (20732796).

Almost surely, 2^82909291 is an apocalyptic number.

82909291 is a deficient number, since it is larger than the sum of its proper divisors (21893).

82909291 is a wasteful number, since it uses less digits than its factorization.

82909291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21892.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 82909291 is about 9105.4539150995. The cubic root of 82909291 is about 436.0481019650.

The spelling of 82909291 in words is "eighty-two million, nine hundred nine thousand, two hundred ninety-one".