985797739 has 2 divisors, whose sum is σ = 985797740. Its totient is φ = 985797738.

The previous prime is 985797719. The next prime is 985797781. The reversal of 985797739 is 937797589.

It is a weak prime.

It is an emirp because it is prime and its reverse (937797589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985797739 - 2⁵ = 985797707 is a prime.

It is not a weakly prime, because it can be changed into another prime (985797719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492898869 + 492898870.

It is an arithmetic number, because the mean of its divisors is an integer number (492898870).

Almost surely, 2^985797739 is an apocalyptic number.

985797739 is a deficient number, since it is larger than the sum of its proper divisors (1).

985797739 is an equidigital number, since it uses as much as digits as its factorization.

985797739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30005640, while the sum is 64.

The square root of 985797739 is about 31397.4161198020. The cubic root of 985797739 is about 995.2433228978.

The spelling of 985797739 in words is "nine hundred eighty-five million, seven hundred ninety-seven thousand, seven hundred thirty-nine".