871665494 has 16 divisors (see below), whose sum is σ = 1530730656. Its totient is φ = 364459200.

The previous prime is 871665493. The next prime is 871665547. The reversal of 871665494 is 494566178.

871665494 is nontrivially palindromic in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871665491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758717 + ... + 759864.

It is an arithmetic number, because the mean of its divisors is an integer number (95670666).

Almost surely, 2^871665494 is an apocalyptic number.

871665494 is a deficient number, since it is larger than the sum of its proper divisors (659065162).

871665494 is a wasteful number, since it uses less digits than its factorization.

871665494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518631.

The product of its digits is 1451520, while the sum is 50.

The square root of 871665494 is about 29523.9816759190. The cubic root of 871665494 is about 955.2490579640.

The spelling of 871665494 in words is "eight hundred seventy-one million, six hundred sixty-five thousand, four hundred ninety-four".