54140239 has 2 divisors, whose sum is σ = 54140240. Its totient is φ = 54140238.

The previous prime is 54140237. The next prime is 54140243. The reversal of 54140239 is 93204145.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54140239 - 2¹ = 54140237 is a prime.

Together with 54140237, 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 (54140237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27070119 + 27070120.

It is an arithmetic number, because the mean of its divisors is an integer number (27070120).

Almost surely, 2^54140239 is an apocalyptic number.

54140239 is a deficient number, since it is larger than the sum of its proper divisors (1).

54140239 is an equidigital number, since it uses as much as digits as its factorization.

54140239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 54140239 is about 7358.0050964918. The cubic root of 54140239 is about 378.3032359548.

The spelling of 54140239 in words is "fifty-four million, one hundred forty thousand, two hundred thirty-nine".