869725529 has 4 divisors (see below), whose sum is σ = 870785700. Its totient is φ = 868665360.

The previous prime is 869725499. The next prime is 869725531. The reversal of 869725529 is 925527968.

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

It can be written as a sum of positive squares in 2 ways, for example, as 180768025 + 688957504 = 13445^2 + 26248^2 .

It is a cyclic number.

It is not a de Polignac number, because 869725529 - 2⁸ = 869725273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869755529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528854 + ... + 530495.

It is an arithmetic number, because the mean of its divisors is an integer number (217696425).

Almost surely, 2^869725529 is an apocalyptic number.

It is an amenable number.

869725529 is a deficient number, since it is larger than the sum of its proper divisors (1060171).

869725529 is a wasteful number, since it uses less digits than its factorization.

869725529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060170.

The product of its digits is 2721600, while the sum is 53.

The square root of 869725529 is about 29491.1093212853. The cubic root of 869725529 is about 954.5398691624.

The spelling of 869725529 in words is "eight hundred sixty-nine million, seven hundred twenty-five thousand, five hundred twenty-nine".