1000631784913 has 2 divisors, whose sum is σ = 1000631784914. Its totient is φ = 1000631784912.

The previous prime is 1000631784881. The next prime is 1000631784937. The reversal of 1000631784913 is 3194871360001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 893796286464 + 106835498449 = 945408^2 + 326857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000631784913 - 2⁵ = 1000631784881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000631784913.

It is not a weakly prime, because it can be changed into another prime (1000631784983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500315892456 + 500315892457.

It is an arithmetic number, because the mean of its divisors is an integer number (500315892457).

Almost surely, 2^{1000631784913} is an apocalyptic number.

It is an amenable number.

1000631784913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000631784913 is an equidigital number, since it uses as much as digits as its factorization.

1000631784913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 1000631784913 in words is "one trillion, six hundred thirty-one million, seven hundred eighty-four thousand, nine hundred thirteen".