985729939 has 2 divisors, whose sum is σ = 985729940. Its totient is φ = 985729938.

The previous prime is 985729907. The next prime is 985729957. The reversal of 985729939 is 939927589.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 985729939 - 2⁵ = 985729907 is a prime.

It is not a weakly prime, because it can be changed into another prime (985729999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492864969 + 492864970.

It is an arithmetic number, because the mean of its divisors is an integer number (492864970).

Almost surely, 2^985729939 is an apocalyptic number.

985729939 is a deficient number, since it is larger than the sum of its proper divisors (1).

985729939 is an equidigital number, since it uses as much as digits as its factorization.

985729939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11022480, while the sum is 61.

The square root of 985729939 is about 31396.3363945541. The cubic root of 985729939 is about 995.2205058290.

The spelling of 985729939 in words is "nine hundred eighty-five million, seven hundred twenty-nine thousand, nine hundred thirty-nine".