83581071317 has 4 divisors (see below), whose sum is σ = 84951252876. Its totient is φ = 82210889760.

The previous prime is 83581071253. The next prime is 83581071331. The reversal of 83581071317 is 71317018538.

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 47227547761 + 36353523556 = 217319^2 + 190666^2 .

It is a cyclic number.

It is not a de Polignac number, because 83581071317 - 2⁶ = 83581071253 is a prime.

It is a super-2 number, since 2×83581071317² (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 (83581071337) 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, 685090688 + ... + 685090809.

It is an arithmetic number, because the mean of its divisors is an integer number (21237813219).

Almost surely, 2^83581071317 is an apocalyptic number.

It is an amenable number.

83581071317 is a deficient number, since it is larger than the sum of its proper divisors (1370181559).

83581071317 is a wasteful number, since it uses less digits than its factorization.

83581071317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370181558.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 83581071317 in words is "eighty-three billion, five hundred eighty-one million, seventy-one thousand, three hundred seventeen".