985535939 has 2 divisors, whose sum is σ = 985535940. Its totient is φ = 985535938.

The previous prime is 985535933. The next prime is 985535977. The reversal of 985535939 is 939535589.

It is a weak prime.

It is an emirp because it is prime and its reverse (939535589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985535939 - 2⁴ = 985535923 is a prime.

It is a super-2 number, since 2×985535939² = 1942562174121223442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (985535933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492767969 + 492767970.

It is an arithmetic number, because the mean of its divisors is an integer number (492767970).

Almost surely, 2^985535939 is an apocalyptic number.

985535939 is a deficient number, since it is larger than the sum of its proper divisors (1).

985535939 is an equidigital number, since it uses as much as digits as its factorization.

985535939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6561000, while the sum is 56.

The square root of 985535939 is about 31393.2467100808. The cubic root of 985535939 is about 995.1552122708.

The spelling of 985535939 in words is "nine hundred eighty-five million, five hundred thirty-five thousand, nine hundred thirty-nine".