85511659 has 4 divisors (see below), whose sum is σ = 87331104. Its totient is φ = 83692216.

The previous prime is 85511653. The next prime is 85511669. The reversal of 85511659 is 95611558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85511659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85511653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909652 + ... + 909745.

It is an arithmetic number, because the mean of its divisors is an integer number (21832776).

Almost surely, 2^85511659 is an apocalyptic number.

85511659 is a deficient number, since it is larger than the sum of its proper divisors (1819445).

85511659 is a wasteful number, since it uses less digits than its factorization.

85511659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819444.

The product of its digits is 54000, while the sum is 40.

The square root of 85511659 is about 9247.2514294789. The cubic root of 85511659 is about 440.5634293795.

The spelling of 85511659 in words is "eighty-five million, five hundred eleven thousand, six hundred fifty-nine".