985018129 has 2 divisors, whose sum is σ = 985018130. Its totient is φ = 985018128.

The previous prime is 985018123. The next prime is 985018141. The reversal of 985018129 is 921810589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903603600 + 81414529 = 30060^2 + 9023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985018129 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (985018123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492509064 + 492509065.

It is an arithmetic number, because the mean of its divisors is an integer number (492509065).

Almost surely, 2^985018129 is an apocalyptic number.

It is an amenable number.

985018129 is a deficient number, since it is larger than the sum of its proper divisors (1).

985018129 is an equidigital number, since it uses as much as digits as its factorization.

985018129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 985018129 is about 31384.9984706069. The cubic root of 985018129 is about 994.9808937183.

The spelling of 985018129 in words is "nine hundred eighty-five million, eighteen thousand, one hundred twenty-nine".