872687777 has 12 divisors (see below), whose sum is σ = 960484284. Its totient is φ = 792342720.

The previous prime is 872687723. The next prime is 872687779. The reversal of 872687777 is 777786278.

It can be written as a sum of positive squares in 6 ways, for example, as 598487296 + 274200481 = 24464^2 + 16559^2 .

It is not a de Polignac number, because 872687777 - 2²⁶ = 805578913 is a prime.

It is a super-2 number, since 2×872687777² = 1523167912250403458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (872687779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32018 + ... + 52635.

It is an arithmetic number, because the mean of its divisors is an integer number (80040357).

Almost surely, 2^872687777 is an apocalyptic number.

It is an amenable number.

872687777 is a deficient number, since it is larger than the sum of its proper divisors (87796507).

872687777 is a wasteful number, since it uses less digits than its factorization.

872687777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84740 (or 84727 counting only the distinct ones).

The product of its digits is 12907776, while the sum is 59.

The square root of 872687777 is about 29541.2893591326. The cubic root of 872687777 is about 955.6223484714.

The spelling of 872687777 in words is "eight hundred seventy-two million, six hundred eighty-seven thousand, seven hundred seventy-seven".