989999491574 has 8 divisors (see below), whose sum is σ = 1485014923128. Its totient is φ = 494994517200.

The previous prime is 989999491573. The next prime is 989999491597. The reversal of 989999491574 is 475194999989.

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

It is a junction number, because it is equal to n+sod(n) for n = 989999491492 and 989999491501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989999491573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373167 + ... + 2758970.

It is an arithmetic number, because the mean of its divisors is an integer number (185626865391).

Almost surely, 2^989999491574 is an apocalyptic number.

989999491574 is a deficient number, since it is larger than the sum of its proper divisors (495015431554).

989999491574 is a wasteful number, since it uses less digits than its factorization.

989999491574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5228590.

The product of its digits is 2380855680, while the sum is 83.

The spelling of 989999491574 in words is "nine hundred eighty-nine billion, nine hundred ninety-nine million, four hundred ninety-one thousand, five hundred seventy-four".