999445849 has 2 divisors, whose sum is σ = 999445850. Its totient is φ = 999445848.

The previous prime is 999445831. The next prime is 999445883. The reversal of 999445849 is 948544999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820421449 + 179024400 = 28643^2 + 13380^2 .

It is a cyclic number.

It is not a de Polignac number, because 999445849 - 2⁵ = 999445817 is a prime.

It is not a weakly prime, because it can be changed into another prime (999445649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499722924 + 499722925.

It is an arithmetic number, because the mean of its divisors is an integer number (499722925).

Almost surely, 2^999445849 is an apocalyptic number.

It is an amenable number.

999445849 is a deficient number, since it is larger than the sum of its proper divisors (1).

999445849 is an equidigital number, since it uses as much as digits as its factorization.

999445849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 61.

The square root of 999445849 is about 31614.0134908556. The cubic root of 999445849 is about 999.8152488691.

The spelling of 999445849 in words is "nine hundred ninety-nine million, four hundred forty-five thousand, eight hundred forty-nine".