82776965 has 4 divisors (see below), whose sum is σ = 99332364. Its totient is φ = 66221568.

The previous prime is 82776929. The next prime is 82776971. The reversal of 82776965 is 56967728.

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 51394561 + 31382404 = 7169^2 + 5602^2 .

It is a cyclic number.

It is not a de Polignac number, because 82776965 - 2¹² = 82772869 is a prime.

It is a super-2 number, since 2×82776965² = 13704051869222450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8277692 + ... + 8277701.

It is an arithmetic number, because the mean of its divisors is an integer number (24833091).

Almost surely, 2^82776965 is an apocalyptic number.

It is an amenable number.

82776965 is a deficient number, since it is larger than the sum of its proper divisors (16555399).

82776965 is a wasteful number, since it uses less digits than its factorization.

82776965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16555398.

The product of its digits is 1270080, while the sum is 50.

The square root of 82776965 is about 9098.1847090505. The cubic root of 82776965 is about 435.8159959891.

The spelling of 82776965 in words is "eighty-two million, seven hundred seventy-six thousand, nine hundred sixty-five".