82609917 has 16 divisors (see below), whose sum is σ = 119141568. Its totient is φ = 50613120.

The previous prime is 82609913. The next prime is 82609927. The reversal of 82609917 is 71990628.

It is not a de Polignac number, because 82609917 - 2² = 82609913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82609913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4542 + ... + 13632.

It is an arithmetic number, because the mean of its divisors is an integer number (7446348).

Almost surely, 2^82609917 is an apocalyptic number.

It is an amenable number.

82609917 is a deficient number, since it is larger than the sum of its proper divisors (36531651).

82609917 is a wasteful number, since it uses less digits than its factorization.

82609917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9340.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 82609917 is about 9088.9997799538. Note that the first 3 decimals coincide. The cubic root of 82609917 is about 435.5226324981.

The spelling of 82609917 in words is "eighty-two million, six hundred nine thousand, nine hundred seventeen".