867690729 has 6 divisors (see below), whose sum is σ = 1253331066. Its totient is φ = 578460480.

The previous prime is 867690673. The next prime is 867690731. The reversal of 867690729 is 927096768.

It can be written as a sum of positive squares in only one way, i.e., 865948329 + 1742400 = 29427^2 + 1320^2 .

It is not a de Polignac number, because 867690729 - 2⁷ = 867690601 is a prime.

It is a super-3 number, since 3×867690729³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (867690029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48205032 + ... + 48205049.

It is an arithmetic number, because the mean of its divisors is an integer number (208888511).

Almost surely, 2^867690729 is an apocalyptic number.

It is an amenable number.

867690729 is a deficient number, since it is larger than the sum of its proper divisors (385640337).

867690729 is a wasteful number, since it uses less digits than its factorization.

867690729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96410087 (or 96410084 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 867690729 is about 29456.5905868279. The cubic root of 867690729 is about 953.7948776454.

The spelling of 867690729 in words is "eight hundred sixty-seven million, six hundred ninety thousand, seven hundred twenty-nine".