85770133 has 2 divisors, whose sum is σ = 85770134. Its totient is φ = 85770132.

The previous prime is 85770127. The next prime is 85770137. The reversal of 85770133 is 33107758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84511249 + 1258884 = 9193^2 + 1122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85770133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85770137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42885066 + 42885067.

It is an arithmetic number, because the mean of its divisors is an integer number (42885067).

Almost surely, 2^85770133 is an apocalyptic number.

It is an amenable number.

85770133 is a deficient number, since it is larger than the sum of its proper divisors (1).

85770133 is an equidigital number, since it uses as much as digits as its factorization.

85770133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 85770133 is about 9261.2166047448. The cubic root of 85770133 is about 441.0068763143.

The spelling of 85770133 in words is "eighty-five million, seven hundred seventy thousand, one hundred thirty-three".