27729539423 has 2 divisors, whose sum is σ = 27729539424. Its totient is φ = 27729539422.

The previous prime is 27729539399. The next prime is 27729539429. The reversal of 27729539423 is 32493592772.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27729539423 is a prime.

It is a super-2 number, since 2×27729539423² (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 (27729539429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864769711 + 13864769712.

It is an arithmetic number, because the mean of its divisors is an integer number (13864769712).

Almost surely, 2^27729539423 is an apocalyptic number.

27729539423 is a deficient number, since it is larger than the sum of its proper divisors (1).

27729539423 is an equidigital number, since it uses as much as digits as its factorization.

27729539423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 53.

The spelling of 27729539423 in words is "twenty-seven billion, seven hundred twenty-nine million, five hundred thirty-nine thousand, four hundred twenty-three".