868829449 has 4 divisors (see below), whose sum is σ = 892311364. Its totient is φ = 845347536.

The previous prime is 868829431. The next prime is 868829459. The reversal of 868829449 is 944928868.

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 781593849 + 87235600 = 27957^2 + 9340^2 .

It is a cyclic number.

It is not a de Polignac number, because 868829449 - 2⁵ = 868829417 is a prime.

It is a super-2 number, since 2×868829449² = 1509729222899287202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 868829393 and 868829402.

It is not an unprimeable number, because it can be changed into a prime (868829459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11740902 + ... + 11740975.

It is an arithmetic number, because the mean of its divisors is an integer number (223077841).

Almost surely, 2^868829449 is an apocalyptic number.

It is an amenable number.

868829449 is a deficient number, since it is larger than the sum of its proper divisors (23481915).

868829449 is a wasteful number, since it uses less digits than its factorization.

868829449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23481914.

The product of its digits is 7962624, while the sum is 58.

The square root of 868829449 is about 29475.9130308121. The cubic root of 868829449 is about 954.2119350499.

The spelling of 868829449 in words is "eight hundred sixty-eight million, eight hundred twenty-nine thousand, four hundred forty-nine".