85165313 has 2 divisors, whose sum is σ = 85165314. Its totient is φ = 85165312.

The previous prime is 85165309. The next prime is 85165331. The reversal of 85165313 is 31356158.

Together with next prime (85165331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42876304 + 42289009 = 6548^2 + 6503^2 .

It is a cyclic number.

It is not a de Polignac number, because 85165313 - 2² = 85165309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85165313.

It is not a weakly prime, because it can be changed into another prime (85165013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42582656 + 42582657.

It is an arithmetic number, because the mean of its divisors is an integer number (42582657).

Almost surely, 2^85165313 is an apocalyptic number.

It is an amenable number.

85165313 is a deficient number, since it is larger than the sum of its proper divisors (1).

85165313 is an equidigital number, since it uses as much as digits as its factorization.

85165313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 85165313 is about 9228.5054586320. The cubic root of 85165313 is about 439.9678230602.

The spelling of 85165313 in words is "eighty-five million, one hundred sixty-five thousand, three hundred thirteen".