985729919 has 4 divisors (see below), whose sum is σ = 1006702944. Its totient is φ = 964756896.

The previous prime is 985729907. The next prime is 985729939. The reversal of 985729919 is 919927589.

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

It is a cyclic number.

It is not a de Polignac number, because 985729919 - 2²⁰ = 984681343 is a prime.

It is a super-2 number, since 2×985729919² = 1943326946423493122, which contains 22 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 (985729939) 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 3 ways as a sum of consecutive naturals, for example, 10486442 + ... + 10486535.

It is an arithmetic number, because the mean of its divisors is an integer number (251675736).

Almost surely, 2^985729919 is an apocalyptic number.

985729919 is a deficient number, since it is larger than the sum of its proper divisors (20973025).

985729919 is a wasteful number, since it uses less digits than its factorization.

985729919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20973024.

The product of its digits is 3674160, while the sum is 59.

The square root of 985729919 is about 31396.3360760456. The cubic root of 985729919 is about 995.2204990982.

The spelling of 985729919 in words is "nine hundred eighty-five million, seven hundred twenty-nine thousand, nine hundred nineteen".