869147018 has 4 divisors (see below), whose sum is σ = 1303720530. Its totient is φ = 434573508.

The previous prime is 869147017. The next prime is 869147029. The reversal of 869147018 is 810741968.

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., 578546809 + 290600209 = 24053^2 + 17047^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 869147018.

It is not an unprimeable number, because it can be changed into a prime (869147011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217286753 + ... + 217286756.

Almost surely, 2^869147018 is an apocalyptic number.

869147018 is a deficient number, since it is larger than the sum of its proper divisors (434573512).

869147018 is a wasteful number, since it uses less digits than its factorization.

869147018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434573511.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 869147018 is about 29481.2994625407. The cubic root of 869147018 is about 954.3281800419.

The spelling of 869147018 in words is "eight hundred sixty-nine million, one hundred forty-seven thousand, eighteen".