985531471 has 4 divisors (see below), whose sum is σ = 993054744. Its totient is φ = 978008200.

The previous prime is 985531453. The next prime is 985531489. The reversal of 985531471 is 174135589.

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

It is an interprime number because it is at equal distance from previous prime (985531453) and next prime (985531489).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985531471 is a prime.

It is a super-3 number, since 3×985531471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985531451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3761440 + ... + 3761701.

It is an arithmetic number, because the mean of its divisors is an integer number (248263686).

Almost surely, 2^985531471 is an apocalyptic number.

985531471 is a deficient number, since it is larger than the sum of its proper divisors (7523273).

985531471 is a wasteful number, since it uses less digits than its factorization.

985531471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7523272.

The product of its digits is 151200, while the sum is 43.

The square root of 985531471 is about 31393.1755481984. The cubic root of 985531471 is about 995.1537083986.

The spelling of 985531471 in words is "nine hundred eighty-five million, five hundred thirty-one thousand, four hundred seventy-one".