27542729 has 2 divisors, whose sum is σ = 27542730. Its totient is φ = 27542728.

The previous prime is 27542719. The next prime is 27542743. The reversal of 27542729 is 92724572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27541504 + 1225 = 5248^2 + 35^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27542729 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27542692 and 27542701.

It is not a weakly prime, because it can be changed into another prime (27542719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13771364 + 13771365.

It is an arithmetic number, because the mean of its divisors is an integer number (13771365).

Almost surely, 2^27542729 is an apocalyptic number.

It is an amenable number.

27542729 is a deficient number, since it is larger than the sum of its proper divisors (1).

27542729 is an equidigital number, since it uses as much as digits as its factorization.

27542729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 27542729 is about 5248.1167098303. The cubic root of 27542729 is about 301.9967873874.

The spelling of 27542729 in words is "twenty-seven million, five hundred forty-two thousand, seven hundred twenty-nine".