869801825 has 12 divisors (see below), whose sum is σ = 1079022828. Its totient is φ = 695539200.

The previous prime is 869801773. The next prime is 869801831. The reversal of 869801825 is 528108968.

It can be written as a sum of positive squares in 6 ways, for example, as 200704 + 869601121 = 448^2 + 29489^2 .

It is a de Polignac number, because none of the positive numbers 2^k-869801825 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 869801825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64685 + ... + 76965.

It is an arithmetic number, because the mean of its divisors is an integer number (89918569).

Almost surely, 2^869801825 is an apocalyptic number.

It is an amenable number.

869801825 is a deficient number, since it is larger than the sum of its proper divisors (209221003).

869801825 is a wasteful number, since it uses less digits than its factorization.

869801825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15124 (or 15119 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 869801825 is about 29492.4028353066. The cubic root of 869801825 is about 954.5677804371.

The spelling of 869801825 in words is "eight hundred sixty-nine million, eight hundred one thousand, eight hundred twenty-five".