871627481 has 6 divisors (see below), whose sum is σ = 911172570. Its totient is φ = 833730128.

The previous prime is 871627469. The next prime is 871627507. The reversal of 871627481 is 184726178.

It can be written as a sum of positive squares in only one way, i.e., 870781081 + 846400 = 29509^2 + 920^2 .

It is a de Polignac number, because none of the positive numbers 2^k-871627481 is a prime.

It is a super-2 number, since 2×871627481² = 1519468931268810722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871627441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 823316 + ... + 824373.

It is an arithmetic number, because the mean of its divisors is an integer number (151862095).

Almost surely, 2^871627481 is an apocalyptic number.

It is an amenable number.

871627481 is a deficient number, since it is larger than the sum of its proper divisors (39545089).

871627481 is a wasteful number, since it uses less digits than its factorization.

871627481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647735 (or 1647712 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 871627481 is about 29523.3379041056. The cubic root of 871627481 is about 955.2351717464.

The spelling of 871627481 in words is "eight hundred seventy-one million, six hundred twenty-seven thousand, four hundred eighty-one".