27145973 has 2 divisors, whose sum is σ = 27145974. Its totient is φ = 27145972.

The previous prime is 27145967. The next prime is 27145981. The reversal of 27145973 is 37954172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27112849 + 33124 = 5207^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 27145973 - 2⁸ = 27145717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27145903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13572986 + 13572987.

It is an arithmetic number, because the mean of its divisors is an integer number (13572987).

Almost surely, 2^27145973 is an apocalyptic number.

It is an amenable number.

27145973 is a deficient number, since it is larger than the sum of its proper divisors (1).

27145973 is an equidigital number, since it uses as much as digits as its factorization.

27145973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 38.

The square root of 27145973 is about 5210.1797473792. The cubic root of 27145973 is about 300.5396693486.

The spelling of 27145973 in words is "twenty-seven million, one hundred forty-five thousand, nine hundred seventy-three".