999948319 has 2 divisors, whose sum is σ = 999948320. Its totient is φ = 999948318.

The previous prime is 999948317. The next prime is 999948331. The reversal of 999948319 is 913849999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999948319 - 2¹ = 999948317 is a prime.

It is a super-2 number, since 2×999948319² = 1999793281341851522, which contains 22 as substring.

Together with 999948317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999948317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499974159 + 499974160.

It is an arithmetic number, because the mean of its divisors is an integer number (499974160).

Almost surely, 2^999948319 is an apocalyptic number.

999948319 is a deficient number, since it is larger than the sum of its proper divisors (1).

999948319 is an equidigital number, since it uses as much as digits as its factorization.

999948319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 61.

The square root of 999948319 is about 31621.9594427670. The cubic root of 999948319 is about 999.9827727032.

The spelling of 999948319 in words is "nine hundred ninety-nine million, nine hundred forty-eight thousand, three hundred nineteen".