27742529 has 2 divisors, whose sum is σ = 27742530. Its totient is φ = 27742528.

The previous prime is 27742513. The next prime is 27742543. The reversal of 27742529 is 92524772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19562929 + 8179600 = 4423^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 27742529 - 2⁴ = 27742513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27742492 and 27742501.

It is not a weakly prime, because it can be changed into another prime (27742229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13871264 + 13871265.

It is an arithmetic number, because the mean of its divisors is an integer number (13871265).

Almost surely, 2^27742529 is an apocalyptic number.

It is an amenable number.

27742529 is a deficient number, since it is larger than the sum of its proper divisors (1).

27742529 is an equidigital number, since it uses as much as digits as its factorization.

27742529 is an odious number, because the sum of its binary digits is odd.

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

The square root of 27742529 is about 5267.1177127533. The cubic root of 27742529 is about 302.7252753550.

The spelling of 27742529 in words is "twenty-seven million, seven hundred forty-two thousand, five hundred twenty-nine".