27091951 has 2 divisors, whose sum is σ = 27091952. Its totient is φ = 27091950.

The previous prime is 27091949. The next prime is 27091963. The reversal of 27091951 is 15919072.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27091951 - 2¹ = 27091949 is a prime.

Together with 27091949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27091901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13545975 + 13545976.

It is an arithmetic number, because the mean of its divisors is an integer number (13545976).

Almost surely, 2^27091951 is an apocalyptic number.

27091951 is a deficient number, since it is larger than the sum of its proper divisors (1).

27091951 is an equidigital number, since it uses as much as digits as its factorization.

27091951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 27091951 is about 5204.9928914457. The cubic root of 27091951 is about 300.3401733870.

The spelling of 27091951 in words is "twenty-seven million, ninety-one thousand, nine hundred fifty-one".