871358649 has 16 divisors (see below), whose sum is σ = 1330065408. Its totient is φ = 497063952.

The previous prime is 871358641. The next prime is 871358671. The reversal of 871358649 is 946853178.

It is not a de Polignac number, because 871358649 - 2³ = 871358641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (871358641) 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 15 ways as a sum of consecutive naturals, for example, 23017 + ... + 47670.

It is an arithmetic number, because the mean of its divisors is an integer number (83129088).

Almost surely, 2^871358649 is an apocalyptic number.

It is an amenable number.

871358649 is a deficient number, since it is larger than the sum of its proper divisors (458706759).

871358649 is a wasteful number, since it uses less digits than its factorization.

871358649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71284.

The product of its digits is 1451520, while the sum is 51.

The square root of 871358649 is about 29518.7846802676. The cubic root of 871358649 is about 955.1369554048.

The spelling of 871358649 in words is "eight hundred seventy-one million, three hundred fifty-eight thousand, six hundred forty-nine".