27145147 has 2 divisors, whose sum is σ = 27145148. Its totient is φ = 27145146.

The previous prime is 27145103. The next prime is 27145163. The reversal of 27145147 is 74154172.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27145147 is a prime.

It is not a weakly prime, because it can be changed into another prime (27145187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13572573 + 13572574.

It is an arithmetic number, because the mean of its divisors is an integer number (13572574).

Almost surely, 2^27145147 is an apocalyptic number.

27145147 is a deficient number, since it is larger than the sum of its proper divisors (1).

27145147 is an equidigital number, since it uses as much as digits as its factorization.

27145147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 31.

The square root of 27145147 is about 5210.1004788775. The cubic root of 27145147 is about 300.5366210354.

The spelling of 27145147 in words is "twenty-seven million, one hundred forty-five thousand, one hundred forty-seven".