871237487 has 4 divisors (see below), whose sum is σ = 871309680. Its totient is φ = 871165296.

The previous prime is 871237481. The next prime is 871237489. The reversal of 871237487 is 784732178.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 784732178 = 2 ⋅392366089.

It is a cyclic number.

It is not a de Polignac number, because 871237487 - 2¹⁰ = 871236463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871237481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13118 + ... + 43755.

It is an arithmetic number, because the mean of its divisors is an integer number (217827420).

Almost surely, 2^871237487 is an apocalyptic number.

871237487 is a deficient number, since it is larger than the sum of its proper divisors (72193).

871237487 is a wasteful number, since it uses less digits than its factorization.

871237487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72192.

The product of its digits is 526848, while the sum is 47.

The square root of 871237487 is about 29516.7323225319. The cubic root of 871237487 is about 955.0926829084.

The spelling of 871237487 in words is "eight hundred seventy-one million, two hundred thirty-seven thousand, four hundred eighty-seven".