999445801 has 2 divisors, whose sum is σ = 999445802. Its totient is φ = 999445800.

The previous prime is 999445757. The next prime is 999445817. The reversal of 999445801 is 108544999.

It is a happy number.

999445801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841290025 + 158155776 = 29005^2 + 12576^2 .

It is a cyclic number.

It is not a de Polignac number, because 999445801 - 2¹⁵ = 999413033 is a prime.

It is not a weakly prime, because it can be changed into another prime (999445831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499722900 + 499722901.

It is an arithmetic number, because the mean of its divisors is an integer number (499722901).

Almost surely, 2^999445801 is an apocalyptic number.

It is an amenable number.

999445801 is a deficient number, since it is larger than the sum of its proper divisors (1).

999445801 is an equidigital number, since it uses as much as digits as its factorization.

999445801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 999445801 is about 31614.0127316986. The cubic root of 999445801 is about 999.8152328632.

The spelling of 999445801 in words is "nine hundred ninety-nine million, four hundred forty-five thousand, eight hundred one".