27421447 has 2 divisors, whose sum is σ = 27421448. Its totient is φ = 27421446.

The previous prime is 27421439. The next prime is 27421469. The reversal of 27421447 is 74412472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27421447 - 2³ = 27421439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27421417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13710723 + 13710724.

It is an arithmetic number, because the mean of its divisors is an integer number (13710724).

Almost surely, 2^27421447 is an apocalyptic number.

27421447 is a deficient number, since it is larger than the sum of its proper divisors (1).

27421447 is an equidigital number, since it uses as much as digits as its factorization.

27421447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544, while the sum is 31.

The square root of 27421447 is about 5236.5491499651. The cubic root of 27421447 is about 301.5528630011.

Subtracting 27421447 from its reverse (74412472), we obtain a square (46991025 = 6855²).

The spelling of 27421447 in words is "twenty-seven million, four hundred twenty-one thousand, four hundred forty-seven".