82671491 has 4 divisors (see below), whose sum is σ = 94481712. Its totient is φ = 70861272.

The previous prime is 82671487. The next prime is 82671509. The reversal of 82671491 is 19417628.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82671491 - 2² = 82671487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82671401) 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, 5905100 + ... + 5905113.

It is an arithmetic number, because the mean of its divisors is an integer number (23620428).

Almost surely, 2^82671491 is an apocalyptic number.

82671491 is a deficient number, since it is larger than the sum of its proper divisors (11810221).

82671491 is a wasteful number, since it uses less digits than its factorization.

82671491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11810220.

The product of its digits is 24192, while the sum is 38.

The square root of 82671491 is about 9092.3864304153. The cubic root of 82671491 is about 435.6308124503.

The spelling of 82671491 in words is "eighty-two million, six hundred seventy-one thousand, four hundred ninety-one".