985499021 has 16 divisors (see below), whose sum is σ = 1098144768. Its totient is φ = 878256000.

The previous prime is 985499017. The next prime is 985499023. The reversal of 985499021 is 120994589.

It is a cyclic number.

It is not a de Polignac number, because 985499021 - 2² = 985499017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985499023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181496 + ... + 186846.

It is an arithmetic number, because the mean of its divisors is an integer number (68634048).

Almost surely, 2^985499021 is an apocalyptic number.

It is an amenable number.

985499021 is a deficient number, since it is larger than the sum of its proper divisors (112645747).

985499021 is a wasteful number, since it uses less digits than its factorization.

985499021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 985499021 is about 31392.6587118708. The cubic root of 985499021 is about 995.1427860035.

The spelling of 985499021 in words is "nine hundred eighty-five million, four hundred ninety-nine thousand, twenty-one".