961616889 has 6 divisors (see below), whose sum is σ = 1389002186. Its totient is φ = 641077920.

The previous prime is 961616881. The next prime is 961616891. The reversal of 961616889 is 988616169.

961616889 is a `hidden beast` number, since 9 + 616 + 16 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 573842025 + 387774864 = 23955^2 + 19692^2 .

It is not a de Polignac number, because 961616889 - 2³ = 961616881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (961616881) 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 5 ways as a sum of consecutive naturals, for example, 53423152 + ... + 53423169.

Almost surely, 2^961616889 is an apocalyptic number.

It is an amenable number.

961616889 is a deficient number, since it is larger than the sum of its proper divisors (427385297).

961616889 is a wasteful number, since it uses less digits than its factorization.

961616889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106846327 (or 106846324 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 961616889 is about 31009.9482263354. The cubic root of 961616889 is about 987.0383511981.

The spelling of 961616889 in words is "nine hundred sixty-one million, six hundred sixteen thousand, eight hundred eighty-nine".