999948259 has 2 divisors, whose sum is σ = 999948260. Its totient is φ = 999948258.

The previous prime is 999948251. The next prime is 999948263. The reversal of 999948259 is 952849999.

It is a strong prime.

It is an emirp because it is prime and its reverse (952849999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999948259 - 2³ = 999948251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999948259.

It is not a weakly prime, because it can be changed into another prime (999948251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499974129 + 499974130.

It is an arithmetic number, because the mean of its divisors is an integer number (499974130).

Almost surely, 2^999948259 is an apocalyptic number.

999948259 is a deficient number, since it is larger than the sum of its proper divisors (1).

999948259 is an equidigital number, since it uses as much as digits as its factorization.

999948259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18895680, while the sum is 64.

The square root of 999948259 is about 31621.9584940592. The cubic root of 999948259 is about 999.9827527025.

The spelling of 999948259 in words is "nine hundred ninety-nine million, nine hundred forty-eight thousand, two hundred fifty-nine".