1009999878929 has 2 divisors, whose sum is σ = 1009999878930. Its totient is φ = 1009999878928.

The previous prime is 1009999878919. The next prime is 1009999878941. The reversal of 1009999878929 is 9298789999001.

1009999878929 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., 879572001025 + 130427877904 = 937855^2 + 361148^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009999878929 - 2²⁰ = 1009998830353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1009999878919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504999939464 + 504999939465.

It is an arithmetic number, because the mean of its divisors is an integer number (504999939465).

Almost surely, 2^{1009999878929} is an apocalyptic number.

It is an amenable number.

1009999878929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009999878929 is an equidigital number, since it uses as much as digits as its factorization.

1009999878929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476171136, while the sum is 80.

The spelling of 1009999878929 in words is "one trillion, nine billion, nine hundred ninety-nine million, eight hundred seventy-eight thousand, nine hundred twenty-nine".