869939835281 has 4 divisors (see below), whose sum is σ = 949025274864. Its totient is φ = 790854395700.

The previous prime is 869939835241. The next prime is 869939835311. The reversal of 869939835281 is 182538939968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 869939835281 - 2³⁰ = 868866093457 is a prime.

It is a super-2 number, since 2×869939835281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869939835241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39542719775 + ... + 39542719796.

It is an arithmetic number, because the mean of its divisors is an integer number (237256318716).

Almost surely, 2^869939835281 is an apocalyptic number.

It is an amenable number.

869939835281 is a deficient number, since it is larger than the sum of its proper divisors (79085439583).

869939835281 is a wasteful number, since it uses less digits than its factorization.

869939835281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79085439582.

The product of its digits is 201553920, while the sum is 71.

The spelling of 869939835281 in words is "eight hundred sixty-nine billion, nine hundred thirty-nine million, eight hundred thirty-five thousand, two hundred eighty-one".