27731147047 has 2 divisors, whose sum is σ = 27731147048. Its totient is φ = 27731147046.

The previous prime is 27731146991. The next prime is 27731147107. The reversal of 27731147047 is 74074113772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27731147047 - 2¹¹ = 27731144999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27731146994 and 27731147012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27731147447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13865573523 + 13865573524.

It is an arithmetic number, because the mean of its divisors is an integer number (13865573524).

Almost surely, 2^27731147047 is an apocalyptic number.

27731147047 is a deficient number, since it is larger than the sum of its proper divisors (1).

27731147047 is an equidigital number, since it uses as much as digits as its factorization.

27731147047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230496, while the sum is 43.

The spelling of 27731147047 in words is "twenty-seven billion, seven hundred thirty-one million, one hundred forty-seven thousand, forty-seven".