871606541 has 8 divisors (see below), whose sum is σ = 993868344. Its totient is φ = 757232640.

The previous prime is 871606531. The next prime is 871606543. The reversal of 871606541 is 145606178.

It can be written as a sum of positive squares in 4 ways, for example, as 76930441 + 794676100 = 8771^2 + 28190^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871606541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 871606495 and 871606504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871606543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1971740 + ... + 1972181.

It is an arithmetic number, because the mean of its divisors is an integer number (124233543).

Almost surely, 2^871606541 is an apocalyptic number.

It is an amenable number.

871606541 is a deficient number, since it is larger than the sum of its proper divisors (122261803).

871606541 is a wasteful number, since it uses less digits than its factorization.

871606541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943951.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 871606541 is about 29522.9832672784. The cubic root of 871606541 is about 955.2275221541.

The spelling of 871606541 in words is "eight hundred seventy-one million, six hundred six thousand, five hundred forty-one".