82505783 has 8 divisors (see below), whose sum is σ = 86433600. Its totient is φ = 78650208.

The previous prime is 82505779. The next prime is 82505791. The reversal of 82505783 is 38750528.

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 82505783 - 2² = 82505779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82505713) 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, 15716 + ... + 20297.

It is an arithmetic number, because the mean of its divisors is an integer number (10804200).

Almost surely, 2^82505783 is an apocalyptic number.

82505783 is a deficient number, since it is larger than the sum of its proper divisors (3927817).

82505783 is a wasteful number, since it uses less digits than its factorization.

82505783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36121.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 82505783 is about 9083.2694003866. The cubic root of 82505783 is about 435.3395560779.

The spelling of 82505783 in words is "eighty-two million, five hundred five thousand, seven hundred eighty-three".