82132691 has 4 divisors (see below), whose sum is σ = 82309032. Its totient is φ = 81956352.

The previous prime is 82132681. The next prime is 82132697. The reversal of 82132691 is 19623128.

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 82132691 - 2¹⁰ = 82131667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82132697) 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, 87470 + ... + 88403.

It is an arithmetic number, because the mean of its divisors is an integer number (20577258).

Almost surely, 2^82132691 is an apocalyptic number.

82132691 is a deficient number, since it is larger than the sum of its proper divisors (176341).

82132691 is a wasteful number, since it uses less digits than its factorization.

82132691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176340.

The product of its digits is 5184, while the sum is 32.

The square root of 82132691 is about 9062.7088113875. The cubic root of 82132691 is about 434.6823611482.

The spelling of 82132691 in words is "eighty-two million, one hundred thirty-two thousand, six hundred ninety-one".