999652879 has 2 divisors, whose sum is σ = 999652880. Its totient is φ = 999652878.

The previous prime is 999652867. The next prime is 999652897. The reversal of 999652879 is 978256999.

Together with next prime (999652897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999652879 - 2¹³ = 999644687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999652879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999650879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499826439 + 499826440.

It is an arithmetic number, because the mean of its divisors is an integer number (499826440).

Almost surely, 2^999652879 is an apocalyptic number.

999652879 is a deficient number, since it is larger than the sum of its proper divisors (1).

999652879 is an equidigital number, since it uses as much as digits as its factorization.

999652879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 64.

The square root of 999652879 is about 31617.2876603924. The cubic root of 999652879 is about 999.8842796093.

The spelling of 999652879 in words is "nine hundred ninety-nine million, six hundred fifty-two thousand, eight hundred seventy-nine".