85909093 has 2 divisors, whose sum is σ = 85909094. Its totient is φ = 85909092.

The previous prime is 85909073. The next prime is 85909097. The reversal of 85909093 is 39090958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65820769 + 20088324 = 8113^2 + 4482^2 .

It is a cyclic number.

It is not a de Polignac number, because 85909093 - 2²⁵ = 52354661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85909097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42954546 + 42954547.

It is an arithmetic number, because the mean of its divisors is an integer number (42954547).

Almost surely, 2^85909093 is an apocalyptic number.

It is an amenable number.

85909093 is a deficient number, since it is larger than the sum of its proper divisors (1).

85909093 is an equidigital number, since it uses as much as digits as its factorization.

85909093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 85909093 is about 9268.7158225938. The cubic root of 85909093 is about 441.2449127486.

The spelling of 85909093 in words is "eighty-five million, nine hundred nine thousand, ninety-three".