82777133 has 4 divisors (see below), whose sum is σ = 83509788. Its totient is φ = 82044480.

The previous prime is 82777127. The next prime is 82777147. The reversal of 82777133 is 33177728.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10220809 + 72556324 = 3197^2 + 8518^2 .

It is a cyclic number.

It is not a de Polignac number, because 82777133 - 2⁴ = 82777117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82777153) 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, 366158 + ... + 366383.

It is an arithmetic number, because the mean of its divisors is an integer number (20877447).

Almost surely, 2^82777133 is an apocalyptic number.

It is an amenable number.

82777133 is a deficient number, since it is larger than the sum of its proper divisors (732655).

82777133 is a wasteful number, since it uses less digits than its factorization.

82777133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732654.

The product of its digits is 49392, while the sum is 38.

The square root of 82777133 is about 9098.1939416568. The cubic root of 82777133 is about 435.8162908257.

The spelling of 82777133 in words is "eighty-two million, seven hundred seventy-seven thousand, one hundred thirty-three".