85209133 has 2 divisors, whose sum is σ = 85209134. Its totient is φ = 85209132.

The previous prime is 85209079. The next prime is 85209143. The reversal of 85209133 is 33190258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57562569 + 27646564 = 7587^2 + 5258^2 .

It is a cyclic number.

It is not a de Polignac number, because 85209133 - 2⁹ = 85208621 is a prime.

It is a super-2 number, since 2×85209133² = 14521192693223378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85209095 and 85209104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85209143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42604566 + 42604567.

It is an arithmetic number, because the mean of its divisors is an integer number (42604567).

Almost surely, 2^85209133 is an apocalyptic number.

It is an amenable number.

85209133 is a deficient number, since it is larger than the sum of its proper divisors (1).

85209133 is an equidigital number, since it uses as much as digits as its factorization.

85209133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 85209133 is about 9230.8793188948. The cubic root of 85209133 is about 440.0432688165.

The spelling of 85209133 in words is "eighty-five million, two hundred nine thousand, one hundred thirty-three".