85306973 has 2 divisors, whose sum is σ = 85306974. Its totient is φ = 85306972.

The previous prime is 85306967. The next prime is 85306981. The reversal of 85306973 is 37960358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69522244 + 15784729 = 8338^2 + 3973^2 .

It is a cyclic number.

It is not a de Polignac number, because 85306973 - 2⁴ = 85306957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85306973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85306913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42653486 + 42653487.

It is an arithmetic number, because the mean of its divisors is an integer number (42653487).

Almost surely, 2^85306973 is an apocalyptic number.

It is an amenable number.

85306973 is a deficient number, since it is larger than the sum of its proper divisors (1).

85306973 is an equidigital number, since it uses as much as digits as its factorization.

85306973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 85306973 is about 9236.1774019342. The cubic root of 85306973 is about 440.2116285677.

The spelling of 85306973 in words is "eighty-five million, three hundred six thousand, nine hundred seventy-three".