859809081 has 8 divisors (see below), whose sum is σ = 1185943680. Its totient is φ = 553440272.

The previous prime is 859809079. The next prime is 859809101. The reversal of 859809081 is 180908958.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 859809081 - 2¹ = 859809079 is a prime.

It is a super-2 number, since 2×859809081² = 1478543311540129122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 859809081.

It is not an unprimeable number, because it can be changed into a prime (859809011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4941345 + ... + 4941518.

It is an arithmetic number, because the mean of its divisors is an integer number (148242960).

Almost surely, 2^859809081 is an apocalyptic number.

It is an amenable number.

859809081 is a deficient number, since it is larger than the sum of its proper divisors (326134599).

859809081 is a wasteful number, since it uses less digits than its factorization.

859809081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9882895.

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 859809081 is about 29322.5012746184. The cubic root of 859809081 is about 950.8981647943.

The spelling of 859809081 in words is "eight hundred fifty-nine million, eight hundred nine thousand, eighty-one".