85009597 has 2 divisors, whose sum is σ = 85009598. Its totient is φ = 85009596.

The previous prime is 85009577. The next prime is 85009621. The reversal of 85009597 is 79590058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50211396 + 34798201 = 7086^2 + 5899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85009597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85009517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42504798 + 42504799.

It is an arithmetic number, because the mean of its divisors is an integer number (42504799).

Almost surely, 2^85009597 is an apocalyptic number.

It is an amenable number.

85009597 is a deficient number, since it is larger than the sum of its proper divisors (1).

85009597 is an equidigital number, since it uses as much as digits as its factorization.

85009597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 43.

The square root of 85009597 is about 9220.0649130036. The cubic root of 85009597 is about 439.6995141909.

The spelling of 85009597 in words is "eighty-five million, nine thousand, five hundred ninety-seven".