865047801 has 4 divisors (see below), whose sum is σ = 1153397072. Its totient is φ = 576698532.

The previous prime is 865047797. The next prime is 865047817. The reversal of 865047801 is 108740568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 865047801 - 2² = 865047797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865047801.

It is not an unprimeable number, because it can be changed into a prime (865047851) 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, 144174631 + ... + 144174636.

It is an arithmetic number, because the mean of its divisors is an integer number (288349268).

Almost surely, 2^865047801 is an apocalyptic number.

It is an amenable number.

865047801 is a deficient number, since it is larger than the sum of its proper divisors (288349271).

865047801 is a wasteful number, since it uses less digits than its factorization.

865047801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288349270.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 865047801 is about 29411.6949698585. The cubic root of 865047801 is about 952.8254942575.

The spelling of 865047801 in words is "eight hundred sixty-five million, forty-seven thousand, eight hundred one".