985814129 has 2 divisors, whose sum is σ = 985814130. Its totient is φ = 985814128.

The previous prime is 985814111. The next prime is 985814153. The reversal of 985814129 is 921418589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493861729 + 491952400 = 22223^2 + 22180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985814129 is a prime.

It is a Chen 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 (985804129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492907064 + 492907065.

It is an arithmetic number, because the mean of its divisors is an integer number (492907065).

Almost surely, 2^985814129 is an apocalyptic number.

It is an amenable number.

985814129 is a deficient number, since it is larger than the sum of its proper divisors (1).

985814129 is an equidigital number, since it uses as much as digits as its factorization.

985814129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 47.

The square root of 985814129 is about 31397.6771274564. The cubic root of 985814129 is about 995.2488385484.

The spelling of 985814129 in words is "nine hundred eighty-five million, eight hundred fourteen thousand, one hundred twenty-nine".