871291487 has 16 divisors (see below), whose sum is σ = 997269504. Its totient is φ = 753948000.

The previous prime is 871291459. The next prime is 871291507. The reversal of 871291487 is 784192178.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 871291487 - 2²⁶ = 804182623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871291787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143 + ... + 41744.

It is an arithmetic number, because the mean of its divisors is an integer number (62329344).

Almost surely, 2^871291487 is an apocalyptic number.

871291487 is a deficient number, since it is larger than the sum of its proper divisors (125978017).

871291487 is a wasteful number, since it uses less digits than its factorization.

871291487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41990.

The product of its digits is 225792, while the sum is 47.

The square root of 871291487 is about 29517.6470437601. The cubic root of 871291487 is about 955.1124149715.

The spelling of 871291487 in words is "eight hundred seventy-one million, two hundred ninety-one thousand, four hundred eighty-seven".