85035207989 has 2 divisors, whose sum is σ = 85035207990. Its totient is φ = 85035207988.

The previous prime is 85035207947. The next prime is 85035208019. The reversal of 85035207989 is 98970253058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74083585489 + 10951622500 = 272183^2 + 104650^2 .

It is a cyclic number.

It is not a de Polignac number, because 85035207989 - 2¹⁶ = 85035142453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85035207889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42517603994 + 42517603995.

It is an arithmetic number, because the mean of its divisors is an integer number (42517603995).

Almost surely, 2^85035207989 is an apocalyptic number.

It is an amenable number.

85035207989 is a deficient number, since it is larger than the sum of its proper divisors (1).

85035207989 is an equidigital number, since it uses as much as digits as its factorization.

85035207989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 85035207989 in words is "eighty-five billion, thirty-five million, two hundred seven thousand, nine hundred eighty-nine".