871540979 has 8 divisors (see below), whose sum is σ = 888192000. Its totient is φ = 854952712.

The previous prime is 871540961. The next prime is 871540987. The reversal of 871540979 is 979045178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871540979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871540939) 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, 12842 + ... + 43680.

It is an arithmetic number, because the mean of its divisors is an integer number (111024000).

Almost surely, 2^871540979 is an apocalyptic number.

871540979 is a deficient number, since it is larger than the sum of its proper divisors (16651021).

871540979 is a wasteful number, since it uses less digits than its factorization.

871540979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31377.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 871540979 is about 29521.8728911294. The cubic root of 871540979 is about 955.2035709046.

It can be divided in two parts, 8715 and 40979, that added together give a palindrome (49694).

The spelling of 871540979 in words is "eight hundred seventy-one million, five hundred forty thousand, nine hundred seventy-nine".