990433573873 has 4 divisors (see below), whose sum is σ = 990771955200. Its totient is φ = 990095192548.

The previous prime is 990433573867. The next prime is 990433573907. The reversal of 990433573873 is 378375334099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990433573873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990433573823) 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, 169186273 + ... + 169192126.

It is an arithmetic number, because the mean of its divisors is an integer number (247692988800).

Almost surely, 2^990433573873 is an apocalyptic number.

It is an amenable number.

990433573873 is a deficient number, since it is larger than the sum of its proper divisors (338381327).

990433573873 is a wasteful number, since it uses less digits than its factorization.

990433573873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338381326.

The product of its (nonzero) digits is 51438240, while the sum is 61.

The spelling of 990433573873 in words is "nine hundred ninety billion, four hundred thirty-three million, five hundred seventy-three thousand, eight hundred seventy-three".