27810149 has 2 divisors, whose sum is σ = 27810150. Its totient is φ = 27810148.

The previous prime is 27810143. The next prime is 27810157. The reversal of 27810149 is 94101872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 37249 = 5270^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 27810149 - 2²⁴ = 11032933 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27810143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13905074 + 13905075.

It is an arithmetic number, because the mean of its divisors is an integer number (13905075).

Almost surely, 2^27810149 is an apocalyptic number.

It is an amenable number.

27810149 is a deficient number, since it is larger than the sum of its proper divisors (1).

27810149 is an equidigital number, since it uses as much as digits as its factorization.

27810149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 27810149 is about 5273.5328765449. The cubic root of 27810149 is about 302.9710312976.

The spelling of 27810149 in words is "twenty-seven million, eight hundred ten thousand, one hundred forty-nine".