985531903 has 4 divisors (see below), whose sum is σ = 985611328. Its totient is φ = 985452480.

The previous prime is 985531847. The next prime is 985531907. The reversal of 985531903 is 309135589.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 985531903 - 2²⁵ = 951977471 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 985531903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985531907) 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, 16626 + ... + 47407.

It is an arithmetic number, because the mean of its divisors is an integer number (246402832).

Almost surely, 2^985531903 is an apocalyptic number.

985531903 is a deficient number, since it is larger than the sum of its proper divisors (79425).

985531903 is a wasteful number, since it uses less digits than its factorization.

985531903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79424.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 985531903 is about 31393.1824286739. The cubic root of 985531903 is about 995.1538538045.

The spelling of 985531903 in words is "nine hundred eighty-five million, five hundred thirty-one thousand, nine hundred three".