852931236989 has 8 divisors (see below), whose sum is σ = 921438943320. Its totient is φ = 784837475136.

The previous prime is 852931236977. The next prime is 852931237127. The reversal of 852931236989 is 989632139258.

It can be written as a sum of positive squares in 4 ways, for example, as 66236743225 + 786694493764 = 257365^2 + 886958^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 852931236989 - 2⁴ = 852931236973 is a prime.

It is a super-2 number, since 2×852931236989² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852931236389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103481834 + ... + 103490075.

It is an arithmetic number, because the mean of its divisors is an integer number (115179867915).

Almost surely, 2^852931236989 is an apocalyptic number.

It is an amenable number.

852931236989 is a deficient number, since it is larger than the sum of its proper divisors (68507706331).

852931236989 is a wasteful number, since it uses less digits than its factorization.

852931236989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206972239.

The product of its digits is 50388480, while the sum is 65.

The spelling of 852931236989 in words is "eight hundred fifty-two billion, nine hundred thirty-one million, two hundred thirty-six thousand, nine hundred eighty-nine".