27971492873 has 4 divisors (see below), whose sum is σ = 28936027140. Its totient is φ = 27006958608.

The previous prime is 27971492869. The next prime is 27971492933. The reversal of 27971492873 is 37829417972.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20038384249 + 7933108624 = 141557^2 + 89068^2 .

It is a cyclic number.

It is not a de Polignac number, because 27971492873 - 2² = 27971492869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27971492863) 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, 482267090 + ... + 482267147.

It is an arithmetic number, because the mean of its divisors is an integer number (7234006785).

Almost surely, 2^27971492873 is an apocalyptic number.

It is an amenable number.

27971492873 is a deficient number, since it is larger than the sum of its proper divisors (964534267).

27971492873 is an equidigital number, since it uses as much as digits as its factorization.

27971492873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964534266.

The product of its digits is 10668672, while the sum is 59.

The spelling of 27971492873 in words is "twenty-seven billion, nine hundred seventy-one million, four hundred ninety-two thousand, eight hundred seventy-three".