849131531 has 8 divisors (see below), whose sum is σ = 854133984. Its totient is φ = 844143040.

The previous prime is 849131519. The next prime is 849131539. The reversal of 849131531 is 135131948.

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

It is a cyclic number.

It is not a de Polignac number, because 849131531 - 2¹⁸ = 848869387 is a prime.

It is a super-2 number, since 2×849131531² = 1442048713876807922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 849131491 and 849131500.

It is not an unprimeable number, because it can be changed into a prime (849131539) 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, 133925 + ... + 140121.

It is an arithmetic number, because the mean of its divisors is an integer number (106766748).

Almost surely, 2^849131531 is an apocalyptic number.

849131531 is a deficient number, since it is larger than the sum of its proper divisors (5002453).

849131531 is a wasteful number, since it uses less digits than its factorization.

849131531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6981.

The product of its digits is 12960, while the sum is 35.

The square root of 849131531 is about 29139.8615473718. The cubic root of 849131531 is about 946.9455103465.

The spelling of 849131531 in words is "eight hundred forty-nine million, one hundred thirty-one thousand, five hundred thirty-one".