27947576347 has 4 divisors (see below), whose sum is σ = 28203976240. Its totient is φ = 27691176456.

The previous prime is 27947576339. The next prime is 27947576357. The reversal of 27947576347 is 74367574972.

It is a happy number.

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 27947576347 - 2³ = 27947576339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27947576357) 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, 128199783 + ... + 128200000.

It is an arithmetic number, because the mean of its divisors is an integer number (7050994060).

Almost surely, 2^27947576347 is an apocalyptic number.

27947576347 is a deficient number, since it is larger than the sum of its proper divisors (256399893).

27947576347 is a wasteful number, since it uses less digits than its factorization.

27947576347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256399892.

The product of its digits is 62233920, while the sum is 61.

The spelling of 27947576347 in words is "twenty-seven billion, nine hundred forty-seven million, five hundred seventy-six thousand, three hundred forty-seven".