985992961 has 4 divisors (see below), whose sum is σ = 986439124. Its totient is φ = 985546800.

The previous prime is 985992947. The next prime is 985992977. The reversal of 985992961 is 169299589.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169299589 = 3673 ⋅46093.

It can be written as a sum of positive squares in 2 ways, for example, as 256992961 + 729000000 = 16031^2 + 27000^2 .

It is a cyclic number.

It is not a de Polignac number, because 985992961 - 2¹⁷ = 985861889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985992896 and 985992905.

It is not an unprimeable number, because it can be changed into a prime (985992901) 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 3 ways as a sum of consecutive naturals, for example, 219750 + ... + 224191.

It is an arithmetic number, because the mean of its divisors is an integer number (246609781).

Almost surely, 2^985992961 is an apocalyptic number.

It is an amenable number.

985992961 is a deficient number, since it is larger than the sum of its proper divisors (446163).

985992961 is a wasteful number, since it uses less digits than its factorization.

985992961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446162.

The product of its digits is 3149280, while the sum is 58.

The square root of 985992961 is about 31400.5248523014. The cubic root of 985992961 is about 995.3090160787.

The spelling of 985992961 in words is "nine hundred eighty-five million, nine hundred ninety-two thousand, nine hundred sixty-one".