999424259 has 2 divisors, whose sum is σ = 999424260. Its totient is φ = 999424258.

The previous prime is 999424253. The next prime is 999424273. The reversal of 999424259 is 952424999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999424259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999424259.

It is not a weakly prime, because it can be changed into another prime (999424253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499712129 + 499712130.

It is an arithmetic number, because the mean of its divisors is an integer number (499712130).

Almost surely, 2^999424259 is an apocalyptic number.

999424259 is a deficient number, since it is larger than the sum of its proper divisors (1).

999424259 is an equidigital number, since it uses as much as digits as its factorization.

999424259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 53.

The square root of 999424259 is about 31613.6720265141. The cubic root of 999424259 is about 999.8080494907.

The spelling of 999424259 in words is "nine hundred ninety-nine million, four hundred twenty-four thousand, two hundred fifty-nine".