987129001013 has 2 divisors, whose sum is σ = 987129001014. Its totient is φ = 987129001012.

The previous prime is 987129001007. The next prime is 987129001073. The reversal of 987129001013 is 310100921789.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526389427729 + 460739573284 = 725527^2 + 678778^2 .

It is a cyclic number.

It is not a de Polignac number, because 987129001013 - 2²⁸ = 986860565557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987129001073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493564500506 + 493564500507.

It is an arithmetic number, because the mean of its divisors is an integer number (493564500507).

Almost surely, 2^987129001013 is an apocalyptic number.

It is an amenable number.

987129001013 is a deficient number, since it is larger than the sum of its proper divisors (1).

987129001013 is an equidigital number, since it uses as much as digits as its factorization.

987129001013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 987129001013 in words is "nine hundred eighty-seven billion, one hundred twenty-nine million, one thousand, thirteen".