82569993 has 8 divisors (see below), whose sum is σ = 120101856. Its totient is φ = 50042400.

The previous prime is 82569983. The next prime is 82570001. The reversal of 82569993 is 39996528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82569993 - 2⁵ = 82569961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82569923) 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, 1251028 + ... + 1251093.

It is an arithmetic number, because the mean of its divisors is an integer number (15012732).

Almost surely, 2^82569993 is an apocalyptic number.

It is an amenable number.

82569993 is a deficient number, since it is larger than the sum of its proper divisors (37531863).

82569993 is a wasteful number, since it uses less digits than its factorization.

82569993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502135.

The product of its digits is 1049760, while the sum is 51.

The square root of 82569993 is about 9086.8032332609. The cubic root of 82569993 is about 435.4524609092.

It can be divided in two parts, 82 and 569993, that added together give a palindrome (570075).

The spelling of 82569993 in words is "eighty-two million, five hundred sixty-nine thousand, nine hundred ninety-three".