8721131327 has 4 divisors (see below), whose sum is σ = 9002458176. Its totient is φ = 8439804480.

The previous prime is 8721131323. The next prime is 8721131333. The reversal of 8721131327 is 7231311278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8721131327 - 2² = 8721131323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721131323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140663378 + ... + 140663439.

It is an arithmetic number, because the mean of its divisors is an integer number (2250614544).

Almost surely, 2^8721131327 is an apocalyptic number.

8721131327 is a deficient number, since it is larger than the sum of its proper divisors (281326849).

8721131327 is a wasteful number, since it uses less digits than its factorization.

8721131327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281326848.

The product of its digits is 14112, while the sum is 35.

The square root of 8721131327 is about 93386.9976335036. The cubic root of 8721131327 is about 2058.3739427998.

The spelling of 8721131327 in words is "eight billion, seven hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty-seven".