999023321 has 4 divisors (see below), whose sum is σ = 1013094144. Its totient is φ = 984952500.

The previous prime is 999023299. The next prime is 999023327. The reversal of 999023321 is 123320999.

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-999023321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999023327) 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, 7035305 + ... + 7035446.

It is an arithmetic number, because the mean of its divisors is an integer number (253273536).

Almost surely, 2^999023321 is an apocalyptic number.

It is an amenable number.

999023321 is a deficient number, since it is larger than the sum of its proper divisors (14070823).

999023321 is a wasteful number, since it uses less digits than its factorization.

999023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14070822.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 999023321 is about 31607.3301782988. The cubic root of 999023321 is about 999.6743342867.

The spelling of 999023321 in words is "nine hundred ninety-nine million, twenty-three thousand, three hundred twenty-one".