869811142 has 4 divisors (see below), whose sum is σ = 1304716716. Its totient is φ = 434905570.

The previous prime is 869811097. The next prime is 869811149. The reversal of 869811142 is 241118968.

869811142 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 is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 869811095 and 869811104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869811149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217452784 + ... + 217452787.

It is an arithmetic number, because the mean of its divisors is an integer number (326179179).

Almost surely, 2^869811142 is an apocalyptic number.

869811142 is a deficient number, since it is larger than the sum of its proper divisors (434905574).

869811142 is a wasteful number, since it uses less digits than its factorization.

869811142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434905573.

The product of its digits is 27648, while the sum is 40.

The square root of 869811142 is about 29492.5607908164. The cubic root of 869811142 is about 954.5711887522.

The spelling of 869811142 in words is "eight hundred sixty-nine million, eight hundred eleven thousand, one hundred forty-two".