85659805 has 16 divisors (see below), whose sum is σ = 128156544. Its totient is φ = 53398080.

The previous prime is 85659781. The next prime is 85659839. The reversal of 85659805 is 50895658.

85659805 = 336² + 337² + ... + 665².

It is a happy number.

It is not a de Polignac number, because 85659805 - 2¹³ = 85651613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110862 + ... + 111631.

It is an arithmetic number, because the mean of its divisors is an integer number (8009784).

Almost surely, 2^85659805 is an apocalyptic number.

It is an amenable number.

85659805 is a deficient number, since it is larger than the sum of its proper divisors (42496739).

85659805 is a wasteful number, since it uses less digits than its factorization.

85659805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222516.

The product of its (nonzero) digits is 432000, while the sum is 46.

The square root of 85659805 is about 9255.2582351872. The cubic root of 85659805 is about 440.8177029115.

The spelling of 85659805 in words is "eighty-five million, six hundred fifty-nine thousand, eight hundred five".