82173917 has 16 divisors (see below), whose sum is σ = 103157760. Its totient is φ = 63824112.

The previous prime is 82173913. The next prime is 82173919. The reversal of 82173917 is 71937128.

It is a cyclic number.

It is not a de Polignac number, because 82173917 - 2² = 82173913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82173913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10373 + ... + 16490.

It is an arithmetic number, because the mean of its divisors is an integer number (6447360).

Almost surely, 2^82173917 is an apocalyptic number.

It is an amenable number.

82173917 is a deficient number, since it is larger than the sum of its proper divisors (20983843).

82173917 is a wasteful number, since it uses less digits than its factorization.

82173917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26912.

The product of its digits is 21168, while the sum is 38.

The square root of 82173917 is about 9064.9830115671. The cubic root of 82173917 is about 434.7550776972.

The spelling of 82173917 in words is "eighty-two million, one hundred seventy-three thousand, nine hundred seventeen".