999781427741 has 2 divisors, whose sum is σ = 999781427742. Its totient is φ = 999781427740.

The previous prime is 999781427713. The next prime is 999781427759. The reversal of 999781427741 is 147724187999.

999781427741 = 707029² + 707030².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499891420900 + 499890006841 = 707030^2 + 707029^2 .

It is an emirp because it is prime and its reverse (147724187999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999781427741 - 2³⁰ = 998707685917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999781427761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499890713870 + 499890713871.

It is an arithmetic number, because the mean of its divisors is an integer number (499890713871).

Almost surely, 2^999781427741 is an apocalyptic number.

999781427741 is the 707030-th centered square number.

It is an amenable number.

999781427741 is a deficient number, since it is larger than the sum of its proper divisors (1).

999781427741 is an equidigital number, since it uses as much as digits as its factorization.

999781427741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64012032, while the sum is 68.

The spelling of 999781427741 in words is "nine hundred ninety-nine billion, seven hundred eighty-one million, four hundred twenty-seven thousand, seven hundred forty-one".