85960309 has 2 divisors, whose sum is σ = 85960310. Its totient is φ = 85960308.

The previous prime is 85960291. The next prime is 85960319. The reversal of 85960309 is 90306958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53436100 + 32524209 = 7310^2 + 5703^2 .

It is a cyclic number.

It is not a de Polignac number, because 85960309 - 2⁷ = 85960181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85960319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42980154 + 42980155.

It is an arithmetic number, because the mean of its divisors is an integer number (42980155).

Almost surely, 2^85960309 is an apocalyptic number.

It is an amenable number.

85960309 is a deficient number, since it is larger than the sum of its proper divisors (1).

85960309 is an equidigital number, since it uses as much as digits as its factorization.

85960309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 85960309 is about 9271.4782532237. The cubic root of 85960309 is about 441.3325802635.

The spelling of 85960309 in words is "eighty-five million, nine hundred sixty thousand, three hundred nine".