865893081 has 8 divisors (see below), whose sum is σ = 1157833600. Its totient is φ = 575607312.

The previous prime is 865893071. The next prime is 865893131. The reversal of 865893081 is 180398568.

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

It is not a de Polignac number, because 865893081 - 2⁷ = 865892953 is a prime.

It is a super-2 number, since 2×865893081² = 1499541655447345122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 865893081.

It is not an unprimeable number, because it can be changed into a prime (865893071) 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, 412465 + ... + 414558.

It is an arithmetic number, because the mean of its divisors is an integer number (144729200).

Almost surely, 2^865893081 is an apocalyptic number.

It is an amenable number.

865893081 is a deficient number, since it is larger than the sum of its proper divisors (291940519).

865893081 is a wasteful number, since it uses less digits than its factorization.

865893081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827375.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 865893081 is about 29426.0612552887. The cubic root of 865893081 is about 953.1357438345.

The spelling of 865893081 in words is "eight hundred sixty-five million, eight hundred ninety-three thousand, eighty-one".