27919429 has 2 divisors, whose sum is σ = 27919430. Its totient is φ = 27919428.

The previous prime is 27919391. The next prime is 27919433. The reversal of 27919429 is 92491972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 5166529 = 4770^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 27919429 - 2⁷ = 27919301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27919459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13959714 + 13959715.

It is an arithmetic number, because the mean of its divisors is an integer number (13959715).

Almost surely, 2^27919429 is an apocalyptic number.

It is an amenable number.

27919429 is a deficient number, since it is larger than the sum of its proper divisors (1).

27919429 is an equidigital number, since it uses as much as digits as its factorization.

27919429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 27919429 is about 5283.8838935011. The cubic root of 27919429 is about 303.3673542596.

The spelling of 27919429 in words is "twenty-seven million, nine hundred nineteen thousand, four hundred twenty-nine".