82770773 has 4 divisors (see below), whose sum is σ = 87639660. Its totient is φ = 77901888.

The previous prime is 82770733. The next prime is 82770781. The reversal of 82770773 is 37707728.

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 44849809 + 37920964 = 6697^2 + 6158^2 .

It is not a de Polignac number, because 82770773 - 2¹⁰ = 82769749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82770773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82770733) 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, 2434418 + ... + 2434451.

It is an arithmetic number, because the mean of its divisors is an integer number (21909915).

Almost surely, 2^82770773 is an apocalyptic number.

It is an amenable number.

82770773 is a deficient number, since it is larger than the sum of its proper divisors (4868887).

82770773 is a wasteful number, since it uses less digits than its factorization.

82770773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868886.

The product of its (nonzero) digits is 115248, while the sum is 41.

The square root of 82770773 is about 9097.8444150249. The cubic root of 82770773 is about 435.8051288760.

The spelling of 82770773 in words is "eighty-two million, seven hundred seventy thousand, seven hundred seventy-three".