85111657 has 2 divisors, whose sum is σ = 85111658. Its totient is φ = 85111656.

The previous prime is 85111633. The next prime is 85111687. The reversal of 85111657 is 75611158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60668521 + 24443136 = 7789^2 + 4944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85111657 is a prime.

It is not a weakly prime, because it can be changed into another prime (85111687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42555828 + 42555829.

It is an arithmetic number, because the mean of its divisors is an integer number (42555829).

Almost surely, 2^85111657 is an apocalyptic number.

It is an amenable number.

85111657 is a deficient number, since it is larger than the sum of its proper divisors (1).

85111657 is an equidigital number, since it uses as much as digits as its factorization.

85111657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 34.

The square root of 85111657 is about 9225.5979210022. The cubic root of 85111657 is about 439.8754072161.

The spelling of 85111657 in words is "eighty-five million, one hundred eleven thousand, six hundred fifty-seven".