54139187 has 2 divisors, whose sum is σ = 54139188. Its totient is φ = 54139186.

The previous prime is 54139153. The next prime is 54139207. The reversal of 54139187 is 78193145.

54139187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54139187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54139187.

It is not a weakly prime, because it can be changed into another prime (54139117) 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, 27069593 + 27069594.

It is an arithmetic number, because the mean of its divisors is an integer number (27069594).

Almost surely, 2^54139187 is an apocalyptic number.

54139187 is a deficient number, since it is larger than the sum of its proper divisors (1).

54139187 is an equidigital number, since it uses as much as digits as its factorization.

54139187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 54139187 is about 7357.9336093770. The cubic root of 54139187 is about 378.3007856665.

The spelling of 54139187 in words is "fifty-four million, one hundred thirty-nine thousand, one hundred eighty-seven".