85397759009 has 2 divisors, whose sum is σ = 85397759010. Its totient is φ = 85397759008.

The previous prime is 85397759003. The next prime is 85397759101. The reversal of 85397759009 is 90095779358.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85397203984 + 555025 = 292228^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 85397759009 - 2⁸ = 85397758753 is a prime.

It is not a weakly prime, because it can be changed into another prime (85397759003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42698879504 + 42698879505.

It is an arithmetic number, because the mean of its divisors is an integer number (42698879505).

Almost surely, 2^85397759009 is an apocalyptic number.

It is an amenable number.

85397759009 is a deficient number, since it is larger than the sum of its proper divisors (1).

85397759009 is an equidigital number, since it uses as much as digits as its factorization.

85397759009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21432600, while the sum is 62.

The spelling of 85397759009 in words is "eighty-five billion, three hundred ninety-seven million, seven hundred fifty-nine thousand, nine".