865880201 has 4 divisors (see below), whose sum is σ = 884303232. Its totient is φ = 847457172.

The previous prime is 865880167. The next prime is 865880237. The reversal of 865880201 is 102088568.

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 a cyclic number.

It is not a de Polignac number, because 865880201 - 2¹⁸ = 865618057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865880801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9211445 + ... + 9211538.

It is an arithmetic number, because the mean of its divisors is an integer number (221075808).

Almost surely, 2^865880201 is an apocalyptic number.

It is an amenable number.

865880201 is a deficient number, since it is larger than the sum of its proper divisors (18423031).

865880201 is a wasteful number, since it uses less digits than its factorization.

865880201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18423030.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 865880201 is about 29425.8424008557. The cubic root of 865880201 is about 953.1310179049.

The spelling of 865880201 in words is "eight hundred sixty-five million, eight hundred eighty thousand, two hundred one".