83717665 has 4 divisors (see below), whose sum is σ = 100461204. Its totient is φ = 66974128.

The previous prime is 83717663. The next prime is 83717713. The reversal of 83717665 is 56671738.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56671738 = 2 ⋅28335869.

It can be written as a sum of positive squares in 2 ways, for example, as 55457809 + 28259856 = 7447^2 + 5316^2 .

It is a cyclic number.

It is not a de Polignac number, because 83717665 - 2¹ = 83717663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83717663) 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, 8371762 + ... + 8371771.

It is an arithmetic number, because the mean of its divisors is an integer number (25115301).

Almost surely, 2^83717665 is an apocalyptic number.

It is an amenable number.

83717665 is a deficient number, since it is larger than the sum of its proper divisors (16743539).

83717665 is a wasteful number, since it uses less digits than its factorization.

83717665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16743538.

The product of its digits is 211680, while the sum is 43.

The square root of 83717665 is about 9149.7357885351. The cubic root of 83717665 is about 437.4606919786.

The spelling of 83717665 in words is "eighty-three million, seven hundred seventeen thousand, six hundred sixty-five".