83591317 has 4 divisors (see below), whose sum is σ = 87990880. Its totient is φ = 79191756.

The previous prime is 83591309. The next prime is 83591323. The reversal of 83591317 is 71319538.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71319538 = 2 ⋅35659769.

It is a cyclic number.

It is not a de Polignac number, because 83591317 - 2³ = 83591309 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 (83591357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2199753 + ... + 2199790.

It is an arithmetic number, because the mean of its divisors is an integer number (21997720).

Almost surely, 2^83591317 is an apocalyptic number.

It is an amenable number.

83591317 is a deficient number, since it is larger than the sum of its proper divisors (4399563).

83591317 is a wasteful number, since it uses less digits than its factorization.

83591317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399562.

The product of its digits is 22680, while the sum is 37.

The square root of 83591317 is about 9142.8287198219. The cubic root of 83591317 is about 437.2405070161.

The spelling of 83591317 in words is "eighty-three million, five hundred ninety-one thousand, three hundred seventeen".