27847933129 has 9 divisors (see below), whose sum is σ = 29394101613. Its totient is φ = 26379248652.

The previous prime is 27847933111. The next prime is 27847933133. The reversal of 27847933129 is 92133974872.

It is a happy number.

The square root of 27847933129 is 166877.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 27847933129 - 2⁵ = 27847933097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27847933129.

It is not an unprimeable number, because it can be changed into a prime (27847933109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3166272 + ... + 3175054.

Almost surely, 2^27847933129 is an apocalyptic number.

27847933129 is the 166877-th square number.

27847933129 is the 83439-th centered octagonal number.

It is an amenable number.

27847933129 is a deficient number, since it is larger than the sum of its proper divisors (1546168484).

27847933129 is an frugal number, since it uses more digits than its factorization.

27847933129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17604 (or 8802 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The spelling of 27847933129 in words is "twenty-seven billion, eight hundred forty-seven million, nine hundred thirty-three thousand, one hundred twenty-nine".