999781427713 has 2 divisors, whose sum is σ = 999781427714. Its totient is φ = 999781427712.

The previous prime is 999781427699. The next prime is 999781427741. The reversal of 999781427713 is 317724187999.

999781427713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 796927573264 + 202853854449 = 892708^2 + 450393^2 .

It is a cyclic number.

It is not a de Polignac number, because 999781427713 - 2²⁵ = 999747873281 is a prime.

It is not a weakly prime, because it can be changed into another prime (999781427773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499890713856 + 499890713857.

It is an arithmetic number, because the mean of its divisors is an integer number (499890713857).

Almost surely, 2^999781427713 is an apocalyptic number.

It is an amenable number.

999781427713 is a deficient number, since it is larger than the sum of its proper divisors (1).

999781427713 is an equidigital number, since it uses as much as digits as its factorization.

999781427713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48009024, while the sum is 67.

The spelling of 999781427713 in words is "nine hundred ninety-nine billion, seven hundred eighty-one million, four hundred twenty-seven thousand, seven hundred thirteen".