985508501 has 2 divisors, whose sum is σ = 985508502. Its totient is φ = 985508500.

The previous prime is 985508483. The next prime is 985508509. The reversal of 985508501 is 105805589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 566487601 + 419020900 = 23801^2 + 20470^2 .

It is a cyclic number.

It is not a de Polignac number, because 985508501 - 2⁶ = 985508437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985508509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492754250 + 492754251.

It is an arithmetic number, because the mean of its divisors is an integer number (492754251).

Almost surely, 2^985508501 is an apocalyptic number.

It is an amenable number.

985508501 is a deficient number, since it is larger than the sum of its proper divisors (1).

985508501 is an equidigital number, since it uses as much as digits as its factorization.

985508501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 985508501 is about 31392.8097022232. The cubic root of 985508501 is about 995.1459769160.

The spelling of 985508501 in words is "nine hundred eighty-five million, five hundred eight thousand, five hundred one".