27708513829 has 2 divisors, whose sum is σ = 27708513830. Its totient is φ = 27708513828.

The previous prime is 27708513779. The next prime is 27708513857. The reversal of 27708513829 is 92831580772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24370332100 + 3338181729 = 156110^2 + 57777^2 .

It is a cyclic number.

It is not a de Polignac number, because 27708513829 - 2¹³ = 27708505637 is a prime.

It is a super-2 number, since 2×27708513829² (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 (27708510829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13854256914 + 13854256915.

It is an arithmetic number, because the mean of its divisors is an integer number (13854256915).

Almost surely, 2^27708513829 is an apocalyptic number.

It is an amenable number.

27708513829 is a deficient number, since it is larger than the sum of its proper divisors (1).

27708513829 is an equidigital number, since it uses as much as digits as its factorization.

27708513829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 27708513829 in words is "twenty-seven billion, seven hundred eight million, five hundred thirteen thousand, eight hundred twenty-nine".