9810989129 has 2 divisors, whose sum is σ = 9810989130. Its totient is φ = 9810989128.

The previous prime is 9810989117. The next prime is 9810989161. The reversal of 9810989129 is 9219890189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8258629129 + 1552360000 = 90877^2 + 39400^2 .

It is an emirp because it is prime and its reverse (9219890189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9810989129 - 2⁴ = 9810989113 is a prime.

It is not a weakly prime, because it can be changed into another prime (9810989329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4905494564 + 4905494565.

It is an arithmetic number, because the mean of its divisors is an integer number (4905494565).

Almost surely, 2^9810989129 is an apocalyptic number.

It is an amenable number.

9810989129 is a deficient number, since it is larger than the sum of its proper divisors (1).

9810989129 is an equidigital number, since it uses as much as digits as its factorization.

9810989129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 56.

The square root of 9810989129 is about 99050.4372983784. The cubic root of 9810989129 is about 2140.7745419600.

The spelling of 9810989129 in words is "nine billion, eight hundred ten million, nine hundred eighty-nine thousand, one hundred twenty-nine".