85311137 has 2 divisors, whose sum is σ = 85311138. Its totient is φ = 85311136.

The previous prime is 85311113. The next prime is 85311169. The reversal of 85311137 is 73111358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62663056 + 22648081 = 7916^2 + 4759^2 .

It is a cyclic number.

It is not a de Polignac number, because 85311137 - 2⁸ = 85310881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85314137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42655568 + 42655569.

It is an arithmetic number, because the mean of its divisors is an integer number (42655569).

Almost surely, 2^85311137 is an apocalyptic number.

It is an amenable number.

85311137 is a deficient number, since it is larger than the sum of its proper divisors (1).

85311137 is an equidigital number, since it uses as much as digits as its factorization.

85311137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 85311137 is about 9236.4028171145. The cubic root of 85311137 is about 440.2187909811.

The spelling of 85311137 in words is "eighty-five million, three hundred eleven thousand, one hundred thirty-seven".