831144661 has 8 divisors (see below), whose sum is σ = 856646784. Its totient is φ = 805891680.

The previous prime is 831144659. The next prime is 831144679. The reversal of 831144661 is 166441138.

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 831144661 - 2¹ = 831144659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831144361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55501 + ... + 68866.

It is an arithmetic number, because the mean of its divisors is an integer number (107080848).

Almost surely, 2^831144661 is an apocalyptic number.

It is an amenable number.

831144661 is a deficient number, since it is larger than the sum of its proper divisors (25502123).

831144661 is a wasteful number, since it uses less digits than its factorization.

831144661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124571.

The product of its digits is 13824, while the sum is 34.

The square root of 831144661 is about 28829.5796188567. The cubic root of 831144661 is about 940.2114587652.

Adding to 831144661 its reverse (166441138), we get a palindrome (997585799).

The spelling of 831144661 in words is "eight hundred thirty-one million, one hundred forty-four thousand, six hundred sixty-one".