869803247 has 4 divisors (see below), whose sum is σ = 870823800. Its totient is φ = 868782696.

The previous prime is 869803243. The next prime is 869803267. The reversal of 869803247 is 742308968.

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

It is a cyclic number.

It is not a de Polignac number, because 869803247 - 2² = 869803243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869803241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508997 + ... + 510702.

It is an arithmetic number, because the mean of its divisors is an integer number (217705950).

Almost surely, 2^869803247 is an apocalyptic number.

869803247 is a deficient number, since it is larger than the sum of its proper divisors (1020553).

869803247 is a wasteful number, since it uses less digits than its factorization.

869803247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020552.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 869803247 is about 29492.4269432002. The cubic root of 869803247 is about 954.5683006301.

The spelling of 869803247 in words is "eight hundred sixty-nine million, eight hundred three thousand, two hundred forty-seven".