961135839 has 12 divisors (see below), whose sum is σ = 1389163776. Its totient is φ = 640361952.

The previous prime is 961135823. The next prime is 961135909. The reversal of 961135839 is 938531169.

961135839 is a `hidden beast` number, since 9 + 61 + 1 + 3 + 583 + 9 = 666.

It is not a de Polignac number, because 961135839 - 2⁴ = 961135823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 961135794 and 961135803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961130839) 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 11 ways as a sum of consecutive naturals, for example, 17142 + ... + 47075.

It is an arithmetic number, because the mean of its divisors is an integer number (115763648).

Almost surely, 2^961135839 is an apocalyptic number.

961135839 is a deficient number, since it is larger than the sum of its proper divisors (428027937).

961135839 is a wasteful number, since it uses less digits than its factorization.

961135839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65886 (or 65883 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 961135839 is about 31002.1908741947. The cubic root of 961135839 is about 986.8737347062.

The spelling of 961135839 in words is "nine hundred sixty-one million, one hundred thirty-five thousand, eight hundred thirty-nine".