999342321 has 16 divisors (see below), whose sum is σ = 1355538240. Its totient is φ = 654707520.

The previous prime is 999342313. The next prime is 999342343. The reversal of 999342321 is 123243999.

It is not a de Polignac number, because 999342321 - 2³ = 999342313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999342301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294591 + ... + 297963.

It is an arithmetic number, because the mean of its divisors is an integer number (84721140).

Almost surely, 2^999342321 is an apocalyptic number.

It is an amenable number.

999342321 is a deficient number, since it is larger than the sum of its proper divisors (356195919).

999342321 is a wasteful number, since it uses less digits than its factorization.

999342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056.

The product of its digits is 104976, while the sum is 42.

The square root of 999342321 is about 31612.3760733039. The cubic root of 999342321 is about 999.7807255889.

The spelling of 999342321 in words is "nine hundred ninety-nine million, three hundred forty-two thousand, three hundred twenty-one".