999994321 has 2 divisors, whose sum is σ = 999994322. Its totient is φ = 999994320.

The previous prime is 999994313. The next prime is 999994337. The reversal of 999994321 is 123499999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 996980625 + 3013696 = 31575^2 + 1736^2 .

It is a cyclic number.

It is not a de Polignac number, because 999994321 - 2³ = 999994313 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (999994381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499997160 + 499997161.

It is an arithmetic number, because the mean of its divisors is an integer number (499997161).

Almost surely, 2^999994321 is an apocalyptic number.

It is an amenable number.

999994321 is a deficient number, since it is larger than the sum of its proper divisors (1).

999994321 is an equidigital number, since it uses as much as digits as its factorization.

999994321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 55.

The square root of 999994321 is about 31622.6868086821. The cubic root of 999994321 is about 999.9981069964.

The spelling of 999994321 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, three hundred twenty-one".