999949519 has 2 divisors, whose sum is σ = 999949520. Its totient is φ = 999949518.

The previous prime is 999949513. The next prime is 999949529. The reversal of 999949519 is 915949999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999949519 - 2¹⁵ = 999916751 is a prime.

It is a super-2 number, since 2×999949519² = 1999798081096662722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999949513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499974759 + 499974760.

It is an arithmetic number, because the mean of its divisors is an integer number (499974760).

Almost surely, 2^999949519 is an apocalyptic number.

999949519 is a deficient number, since it is larger than the sum of its proper divisors (1).

999949519 is an equidigital number, since it uses as much as digits as its factorization.

999949519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10628820, while the sum is 64.

The square root of 999949519 is about 31621.9784169176. The cubic root of 999949519 is about 999.9831727168.

The spelling of 999949519 in words is "nine hundred ninety-nine million, nine hundred forty-nine thousand, five hundred nineteen".