27797946829 has 2 divisors, whose sum is σ = 27797946830. Its totient is φ = 27797946828.

The previous prime is 27797946779. The next prime is 27797946859. The reversal of 27797946829 is 92864979772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27655024804 + 142922025 = 166298^2 + 11955^2 .

It is a cyclic number.

It is not a de Polignac number, because 27797946829 - 2¹⁵ = 27797914061 is a prime.

It is a super-2 number, since 2×27797946829² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27797946859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13898973414 + 13898973415.

It is an arithmetic number, because the mean of its divisors is an integer number (13898973415).

Almost surely, 2^27797946829 is an apocalyptic number.

It is an amenable number.

27797946829 is a deficient number, since it is larger than the sum of its proper divisors (1).

27797946829 is an equidigital number, since it uses as much as digits as its factorization.

27797946829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192036096, while the sum is 70.

The spelling of 27797946829 in words is "twenty-seven billion, seven hundred ninety-seven million, nine hundred forty-six thousand, eight hundred twenty-nine".