983235031561 has 4 divisors (see below), whose sum is σ = 983655040324. Its totient is φ = 982815022800.

The previous prime is 983235031529. The next prime is 983235031589. The reversal of 983235031561 is 165130532389.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 724764471561 + 258470560000 = 851331^2 + 508400^2 .

It is a cyclic number.

It is not a de Polignac number, because 983235031561 - 2⁵ = 983235031529 is a prime.

It is a super-2 number, since 2×983235031561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (983235031501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210000870 + ... + 210005551.

It is an arithmetic number, because the mean of its divisors is an integer number (245913760081).

Almost surely, 2^983235031561 is an apocalyptic number.

It is an amenable number.

983235031561 is a deficient number, since it is larger than the sum of its proper divisors (420008763).

983235031561 is a wasteful number, since it uses less digits than its factorization.

983235031561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420008762.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 983235031561 in words is "nine hundred eighty-three billion, two hundred thirty-five million, thirty-one thousand, five hundred sixty-one".