27450391 has 2 divisors, whose sum is σ = 27450392. Its totient is φ = 27450390.

The previous prime is 27450377. The next prime is 27450433. The reversal of 27450391 is 19305472.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27450391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27450691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13725195 + 13725196.

It is an arithmetic number, because the mean of its divisors is an integer number (13725196).

Almost surely, 2^27450391 is an apocalyptic number.

27450391 is a deficient number, since it is larger than the sum of its proper divisors (1).

27450391 is an equidigital number, since it uses as much as digits as its factorization.

27450391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 27450391 is about 5239.3120731638. The cubic root of 27450391 is about 301.6589244712.

The spelling of 27450391 in words is "twenty-seven million, four hundred fifty thousand, three hundred ninety-one".