82045805 has 8 divisors (see below), whose sum is σ = 98575512. Its totient is φ = 65556288.

The previous prime is 82045787. The next prime is 82045823. The reversal of 82045805 is 50854028.

It is an interprime number because it is at equal distance from previous prime (82045787) and next prime (82045823).

It can be written as a sum of positive squares in 4 ways, for example, as 2157961 + 79887844 = 1469^2 + 8938^2 .

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 82045805 - 2¹⁸ = 81783661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5354 + ... + 13883.

It is an arithmetic number, because the mean of its divisors is an integer number (12321939).

Almost surely, 2^82045805 is an apocalyptic number.

It is an amenable number.

82045805 is a deficient number, since it is larger than the sum of its proper divisors (16529707).

82045805 is a wasteful number, since it uses less digits than its factorization.

82045805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20095.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 82045805 is about 9057.9139430666. The cubic root of 82045805 is about 434.5290274112.

The spelling of 82045805 in words is "eighty-two million, forty-five thousand, eight hundred five".