852137391 has 24 divisors (see below), whose sum is σ = 1322796720. Its totient is φ = 486525312.

The previous prime is 852137389. The next prime is 852137443. The reversal of 852137391 is 193731258.

It is not a de Polignac number, because 852137391 - 2¹ = 852137389 is a prime.

It is a super-2 number, since 2×852137391² = 1452276266280573762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852137381) 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 23 ways as a sum of consecutive naturals, for example, 296835 + ... + 299691.

It is an arithmetic number, because the mean of its divisors is an integer number (55116530).

Almost surely, 2^852137391 is an apocalyptic number.

852137391 is a deficient number, since it is larger than the sum of its proper divisors (470659329).

852137391 is a wasteful number, since it uses less digits than its factorization.

852137391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903 (or 4896 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 852137391 is about 29191.3924128329. The cubic root of 852137391 is about 948.0615657732.

The spelling of 852137391 in words is "eight hundred fifty-two million, one hundred thirty-seven thousand, three hundred ninety-one".