985661953 has 8 divisors (see below), whose sum is σ = 1009014336. Its totient is φ = 962329200.

The previous prime is 985661951. The next prime is 985661977. The reversal of 985661953 is 359166589.

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 985661953 - 2¹ = 985661951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 985661953.

It is not an unprimeable number, because it can be changed into a prime (985661951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165243 + ... + 171103.

It is an arithmetic number, because the mean of its divisors is an integer number (126126792).

Almost surely, 2^985661953 is an apocalyptic number.

It is an amenable number.

985661953 is a deficient number, since it is larger than the sum of its proper divisors (23352383).

985661953 is a wasteful number, since it uses less digits than its factorization.

985661953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9815.

The product of its digits is 1749600, while the sum is 52.

The square root of 985661953 is about 31395.2536699419. The cubic root of 985661953 is about 995.1976251142.

The spelling of 985661953 in words is "nine hundred eighty-five million, six hundred sixty-one thousand, nine hundred fifty-three".