27985472429 has 2 divisors, whose sum is σ = 27985472430. Its totient is φ = 27985472428.

The previous prime is 27985472413. The next prime is 27985472441. The reversal of 27985472429 is 92427458972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27783889225 + 201583204 = 166685^2 + 14198^2 .

It is a cyclic number.

It is not a de Polignac number, because 27985472429 - 2⁴ = 27985472413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27981472429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13992736214 + 13992736215.

It is an arithmetic number, because the mean of its divisors is an integer number (13992736215).

Almost surely, 2^27985472429 is an apocalyptic number.

It is an amenable number.

27985472429 is a deficient number, since it is larger than the sum of its proper divisors (1).

27985472429 is an equidigital number, since it uses as much as digits as its factorization.

27985472429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 59.

The spelling of 27985472429 in words is "twenty-seven billion, nine hundred eighty-five million, four hundred seventy-two thousand, four hundred twenty-nine".