85135807 has 2 divisors, whose sum is σ = 85135808. Its totient is φ = 85135806.

The previous prime is 85135781. The next prime is 85135823. The reversal of 85135807 is 70853158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85135807 - 2⁷ = 85135679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85135877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42567903 + 42567904.

It is an arithmetic number, because the mean of its divisors is an integer number (42567904).

Almost surely, 2^85135807 is an apocalyptic number.

85135807 is a deficient number, since it is larger than the sum of its proper divisors (1).

85135807 is an equidigital number, since it uses as much as digits as its factorization.

85135807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 85135807 is about 9226.9066864253. The cubic root of 85135807 is about 439.9170074186.

The spelling of 85135807 in words is "eighty-five million, one hundred thirty-five thousand, eight hundred seven".