82694779489 has 9 divisors (see below), whose sum is σ = 96198309651. Its totient is φ = 70879514160.

The previous prime is 82694779483. The next prime is 82694779513. The reversal of 82694779489 is 98497749628.

The square root of 82694779489 is 287567.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 34751297889 + 47943481600 = 186417^2 + 218960^2 .

It is not a de Polignac number, because 82694779489 - 2⁵ = 82694779457 is a prime.

It is a super-2 number, since 2×82694779489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82694779483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1992429 + ... + 2033509.

Almost surely, 2^82694779489 is an apocalyptic number.

82694779489 is the 287567-th square number.

82694779489 is the 143784-th centered octagonal number.

It is an amenable number.

82694779489 is a deficient number, since it is larger than the sum of its proper divisors (13503530162).

82694779489 is an frugal number, since it uses more digits than its factorization.

82694779489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82176 (or 41088 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 73.

The spelling of 82694779489 in words is "eighty-two billion, six hundred ninety-four million, seven hundred seventy-nine thousand, four hundred eighty-nine".