985172771 has 8 divisors (see below), whose sum is σ = 1076418288. Its totient is φ = 894208000.

The previous prime is 985172663. The next prime is 985172803. The reversal of 985172771 is 177271589.

985172771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985172771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (985172371) 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, 62810 + ... + 76911.

It is an arithmetic number, because the mean of its divisors is an integer number (134552286).

Almost surely, 2^985172771 is an apocalyptic number.

985172771 is a deficient number, since it is larger than the sum of its proper divisors (91245517).

985172771 is a wasteful number, since it uses less digits than its factorization.

985172771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140373.

The product of its digits is 246960, while the sum is 47.

The square root of 985172771 is about 31387.4620031630. The cubic root of 985172771 is about 995.0329596920.

The spelling of 985172771 in words is "nine hundred eighty-five million, one hundred seventy-two thousand, seven hundred seventy-one".