83691271 has 4 divisors (see below), whose sum is σ = 84159000. Its totient is φ = 83223544.

The previous prime is 83691263. The next prime is 83691277. The reversal of 83691271 is 17219638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17219638 = 2 ⋅8609819.

It is not a de Polignac number, because 83691271 - 2³ = 83691263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83691271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83691277) 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, 233596 + ... + 233953.

It is an arithmetic number, because the mean of its divisors is an integer number (21039750).

Almost surely, 2^83691271 is an apocalyptic number.

83691271 is a deficient number, since it is larger than the sum of its proper divisors (467729).

83691271 is a wasteful number, since it uses less digits than its factorization.

83691271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467728.

The product of its digits is 18144, while the sum is 37.

The square root of 83691271 is about 9148.2933381041. The cubic root of 83691271 is about 437.4147138244.

The spelling of 83691271 in words is "eighty-three million, six hundred ninety-one thousand, two hundred seventy-one".