82149133 has 4 divisors (see below), whose sum is σ = 89617248. Its totient is φ = 74681020.

The previous prime is 82149121. The next prime is 82149149. The reversal of 82149133 is 33194128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82149133 - 2²¹ = 80051981 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82149095 and 82149104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82149433) 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, 3734041 + ... + 3734062.

It is an arithmetic number, because the mean of its divisors is an integer number (22404312).

Almost surely, 2^82149133 is an apocalyptic number.

It is an amenable number.

82149133 is a deficient number, since it is larger than the sum of its proper divisors (7468115).

82149133 is a wasteful number, since it uses less digits than its factorization.

82149133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468114.

The product of its digits is 5184, while the sum is 31.

The square root of 82149133 is about 9063.6158899194. The cubic root of 82149133 is about 434.7113653138.

The spelling of 82149133 in words is "eighty-two million, one hundred forty-nine thousand, one hundred thirty-three".