83491271 has 4 divisors (see below), whose sum is σ = 85066632. Its totient is φ = 81915912.

The previous prime is 83491253. The next prime is 83491273. The reversal of 83491271 is 17219438.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17219438 = 2 ⋅8609719.

It is a cyclic number.

It is not a de Polignac number, because 83491271 - 2¹⁴ = 83474887 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 (83491273) 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, 787601 + ... + 787706.

It is an arithmetic number, because the mean of its divisors is an integer number (21266658).

Almost surely, 2^83491271 is an apocalyptic number.

83491271 is a deficient number, since it is larger than the sum of its proper divisors (1575361).

83491271 is a wasteful number, since it uses less digits than its factorization.

83491271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575360.

The product of its digits is 12096, while the sum is 35.

The square root of 83491271 is about 9137.3557991358. The cubic root of 83491271 is about 437.0660007451.

The spelling of 83491271 in words is "eighty-three million, four hundred ninety-one thousand, two hundred seventy-one".