871800101 has 4 divisors (see below), whose sum is σ = 871944012. Its totient is φ = 871656192.

The previous prime is 871800079. The next prime is 871800109. The reversal of 871800101 is 101008178.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 480749476 + 391050625 = 21926^2 + 19775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871800101 is a prime.

It is a super-2 number, since 2×871800101² = 1520070832207220402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871800109) 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, 62450 + ... + 75123.

It is an arithmetic number, because the mean of its divisors is an integer number (217986003).

Almost surely, 2^871800101 is an apocalyptic number.

It is an amenable number.

871800101 is a deficient number, since it is larger than the sum of its proper divisors (143911).

871800101 is a wasteful number, since it uses less digits than its factorization.

871800101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143910.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 871800101 is about 29526.2612093032. The cubic root of 871800101 is about 955.2982268989.

Adding to 871800101 its reverse (101008178), we get a palindrome (972808279).

The spelling of 871800101 in words is "eight hundred seventy-one million, eight hundred thousand, one hundred one".