871612201 has 4 divisors (see below), whose sum is σ = 871689600. Its totient is φ = 871534804.

The previous prime is 871612199. The next prime is 871612211. The reversal of 871612201 is 102216178.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 102216178 = 2 ⋅51108089.

It is a cyclic number.

It is not a de Polignac number, because 871612201 - 2¹ = 871612199 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 871612201.

It is not an unprimeable number, because it can be changed into a prime (871612211) 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, 18181 + ... + 45538.

It is an arithmetic number, because the mean of its divisors is an integer number (217922400).

Almost surely, 2^871612201 is an apocalyptic number.

It is an amenable number.

871612201 is a deficient number, since it is larger than the sum of its proper divisors (77399).

871612201 is a wasteful number, since it uses less digits than its factorization.

871612201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77398.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 871612201 is about 29523.0791246442. The cubic root of 871612201 is about 955.2295898210.

Adding to 871612201 its reverse (102216178), we get a palindrome (973828379).

The spelling of 871612201 in words is "eight hundred seventy-one million, six hundred twelve thousand, two hundred one".