27421871 has 2 divisors, whose sum is σ = 27421872. Its totient is φ = 27421870.

The previous prime is 27421861. The next prime is 27421897. The reversal of 27421871 is 17812472.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27421871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27421861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13710935 + 13710936.

It is an arithmetic number, because the mean of its divisors is an integer number (13710936).

Almost surely, 2^27421871 is an apocalyptic number.

27421871 is a deficient number, since it is larger than the sum of its proper divisors (1).

27421871 is an equidigital number, since it uses as much as digits as its factorization.

27421871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6272, while the sum is 32.

The square root of 27421871 is about 5236.5896344854. The cubic root of 27421871 is about 301.5544172317.

The spelling of 27421871 in words is "twenty-seven million, four hundred twenty-one thousand, eight hundred seventy-one".