27742151 has 2 divisors, whose sum is σ = 27742152. Its totient is φ = 27742150.

The previous prime is 27742139. The next prime is 27742153. The reversal of 27742151 is 15124772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27742151 is a prime.

Together with 27742153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27742153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13871075 + 13871076.

It is an arithmetic number, because the mean of its divisors is an integer number (13871076).

Almost surely, 2^27742151 is an apocalyptic number.

27742151 is a deficient number, since it is larger than the sum of its proper divisors (1).

27742151 is an equidigital number, since it uses as much as digits as its factorization.

27742151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 29.

The square root of 27742151 is about 5267.0818296282. The cubic root of 27742151 is about 302.7239004422.

The spelling of 27742151 in words is "twenty-seven million, seven hundred forty-two thousand, one hundred fifty-one".