869442147 has 48 divisors (see below), whose sum is σ = 1553748480. Its totient is φ = 470638512.

The previous prime is 869442103. The next prime is 869442149. The reversal of 869442147 is 741244968.

869442147 is a `hidden beast` number, since 8 + 69 + 442 + 147 = 666.

869442147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 869442147 - 2⁷ = 869442019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (869442149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61858 + ... + 74600.

It is an arithmetic number, because the mean of its divisors is an integer number (32369760).

Almost surely, 2^869442147 is an apocalyptic number.

869442147 is a deficient number, since it is larger than the sum of its proper divisors (684306333).

869442147 is a wasteful number, since it uses less digits than its factorization.

869442147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797 (or 12772 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 869442147 is about 29486.3043971265. The cubic root of 869442147 is about 954.4361855701.

The spelling of 869442147 in words is "eight hundred sixty-nine million, four hundred forty-two thousand, one hundred forty-seven".