54439391 has 2 divisors, whose sum is σ = 54439392. Its totient is φ = 54439390.

The previous prime is 54439387. The next prime is 54439397. The reversal of 54439391 is 19393445.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54439391 - 2² = 54439387 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 (54439397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27219695 + 27219696.

It is an arithmetic number, because the mean of its divisors is an integer number (27219696).

Almost surely, 2^54439391 is an apocalyptic number.

54439391 is a deficient number, since it is larger than the sum of its proper divisors (1).

54439391 is an equidigital number, since it uses as much as digits as its factorization.

54439391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 38.

The square root of 54439391 is about 7378.3054287553. The cubic root of 54439391 is about 378.9987283068.

The spelling of 54439391 in words is "fifty-four million, four hundred thirty-nine thousand, three hundred ninety-one".