1000999878839 has 2 divisors, whose sum is σ = 1000999878840. Its totient is φ = 1000999878838.

The previous prime is 1000999878817. The next prime is 1000999878847. The reversal of 1000999878839 is 9388789990001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000999878839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000999872839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500499939419 + 500499939420.

It is an arithmetic number, because the mean of its divisors is an integer number (500499939420).

Almost surely, 2^{1000999878839} is an apocalyptic number.

1000999878839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000999878839 is an equidigital number, since it uses as much as digits as its factorization.

1000999878839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70543872, while the sum is 71.

The spelling of 1000999878839 in words is "one trillion, nine hundred ninety-nine million, eight hundred seventy-eight thousand, eight hundred thirty-nine".