82605899 has 4 divisors (see below), whose sum is σ = 82624080. Its totient is φ = 82587720.

The previous prime is 82605889. The next prime is 82605923. The reversal of 82605899 is 99850628.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 82605899 - 2¹² = 82601803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82605869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4322 + ... + 13560.

It is an arithmetic number, because the mean of its divisors is an integer number (20656020).

Almost surely, 2^82605899 is an apocalyptic number.

82605899 is a deficient number, since it is larger than the sum of its proper divisors (18181).

82605899 is an equidigital number, since it uses as much as digits as its factorization.

82605899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18180.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 82605899 is about 9088.7787408430. The cubic root of 82605899 is about 435.5155713672.

The spelling of 82605899 in words is "eighty-two million, six hundred five thousand, eight hundred ninety-nine".