869729842 has 4 divisors (see below), whose sum is σ = 1304594766. Its totient is φ = 434864920.

The previous prime is 869729801. The next prime is 869729867. The reversal of 869729842 is 248927968.

869729842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 803779201 + 65950641 = 28351^2 + 8121^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217432459 + ... + 217432462.

Almost surely, 2^869729842 is an apocalyptic number.

869729842 is a deficient number, since it is larger than the sum of its proper divisors (434864924).

869729842 is a wasteful number, since it uses less digits than its factorization.

869729842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434864923.

The product of its digits is 3483648, while the sum is 55.

The square root of 869729842 is about 29491.1824449275. The cubic root of 869729842 is about 954.5414470256.

The spelling of 869729842 in words is "eight hundred sixty-nine million, seven hundred twenty-nine thousand, eight hundred forty-two".