999445319 has 2 divisors, whose sum is σ = 999445320. Its totient is φ = 999445318.

The previous prime is 999445313. The next prime is 999445387. The reversal of 999445319 is 913544999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999445319 - 2⁴ = 999445303 is a prime.

It is a super-2 number, since 2×999445319² = 1997781891342023522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999445313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499722659 + 499722660.

It is an arithmetic number, because the mean of its divisors is an integer number (499722660).

Almost surely, 2^999445319 is an apocalyptic number.

999445319 is a deficient number, since it is larger than the sum of its proper divisors (1).

999445319 is an equidigital number, since it uses as much as digits as its factorization.

999445319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 999445319 is about 31614.0051084958. The cubic root of 999445319 is about 999.8150721371.

The spelling of 999445319 in words is "nine hundred ninety-nine million, four hundred forty-five thousand, three hundred nineteen".