54381391 has 2 divisors, whose sum is σ = 54381392. Its totient is φ = 54381390.

The previous prime is 54381389. The next prime is 54381427. The reversal of 54381391 is 19318345.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54381391 - 2¹ = 54381389 is a prime.

Together with 54381389, 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 (54381091) 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, 27190695 + 27190696.

It is an arithmetic number, because the mean of its divisors is an integer number (27190696).

Almost surely, 2^54381391 is an apocalyptic number.

54381391 is a deficient number, since it is larger than the sum of its proper divisors (1).

54381391 is an equidigital number, since it uses as much as digits as its factorization.

54381391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 54381391 is about 7374.3739395287. The cubic root of 54381391 is about 378.8640847640.

The spelling of 54381391 in words is "fifty-four million, three hundred eighty-one thousand, three hundred ninety-one".