82918190917 has 4 divisors (see below), whose sum is σ = 84054056620. Its totient is φ = 81782325216.

The previous prime is 82918190911. The next prime is 82918190933. The reversal of 82918190917 is 71909181928.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28090095201 + 54828095716 = 167601^2 + 234154^2 .

It is a cyclic number.

It is not a de Polignac number, because 82918190917 - 2²⁷ = 82783973189 is a prime.

It is a super-2 number, since 2×82918190917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82918190911) 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, 567932742 + ... + 567932887.

It is an arithmetic number, because the mean of its divisors is an integer number (21013514155).

Almost surely, 2^82918190917 is an apocalyptic number.

It is an amenable number.

82918190917 is a deficient number, since it is larger than the sum of its proper divisors (1135865703).

82918190917 is a wasteful number, since it uses less digits than its factorization.

82918190917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135865702.

The product of its (nonzero) digits is 653184, while the sum is 55.

The spelling of 82918190917 in words is "eighty-two billion, nine hundred eighteen million, one hundred ninety thousand, nine hundred seventeen".