27470447909 has 2 divisors, whose sum is σ = 27470447910. Its totient is φ = 27470447908.

The previous prime is 27470447801. The next prime is 27470447929. The reversal of 27470447909 is 90974407472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26494072900 + 976375009 = 162770^2 + 31247^2 .

It is a cyclic number.

It is not a de Polignac number, because 27470447909 - 2¹² = 27470443813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27470447929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13735223954 + 13735223955.

It is an arithmetic number, because the mean of its divisors is an integer number (13735223955).

Almost surely, 2^27470447909 is an apocalyptic number.

It is an amenable number.

27470447909 is a deficient number, since it is larger than the sum of its proper divisors (1).

27470447909 is an equidigital number, since it uses as much as digits as its factorization.

27470447909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 27470447909 in words is "twenty-seven billion, four hundred seventy million, four hundred forty-seven thousand, nine hundred nine".