82645117 has 4 divisors (see below), whose sum is σ = 86994880. Its totient is φ = 78295356.

The previous prime is 82645111. The next prime is 82645151. The reversal of 82645117 is 71154628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82645117 - 2²³ = 74256509 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 (82645111) 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, 2174853 + ... + 2174890.

It is an arithmetic number, because the mean of its divisors is an integer number (21748720).

Almost surely, 2^82645117 is an apocalyptic number.

It is an amenable number.

82645117 is a deficient number, since it is larger than the sum of its proper divisors (4349763).

82645117 is a wasteful number, since it uses less digits than its factorization.

82645117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349762.

The product of its digits is 13440, while the sum is 34.

The square root of 82645117 is about 9090.9359804148. The cubic root of 82645117 is about 435.5844822950.

The spelling of 82645117 in words is "eighty-two million, six hundred forty-five thousand, one hundred seventeen".