85111687 has 2 divisors, whose sum is σ = 85111688. Its totient is φ = 85111686.

The previous prime is 85111657. The next prime is 85111727. The reversal of 85111687 is 78611158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85111687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85111657) 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, 42555843 + 42555844.

It is an arithmetic number, because the mean of its divisors is an integer number (42555844).

Almost surely, 2^85111687 is an apocalyptic number.

85111687 is a deficient number, since it is larger than the sum of its proper divisors (1).

85111687 is an equidigital number, since it uses as much as digits as its factorization.

85111687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 37.

The square root of 85111687 is about 9225.5995469129. The cubic root of 85111687 is about 439.8754588982.

The spelling of 85111687 in words is "eighty-five million, one hundred eleven thousand, six hundred eighty-seven".