54138787 has 2 divisors, whose sum is σ = 54138788. Its totient is φ = 54138786.

The previous prime is 54138731. The next prime is 54138817. The reversal of 54138787 is 78783145.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54138787 - 2¹⁹ = 53614499 is a prime.

It is not a weakly prime, because it can be changed into another prime (54130787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27069393 + 27069394.

It is an arithmetic number, because the mean of its divisors is an integer number (27069394).

Almost surely, 2^54138787 is an apocalyptic number.

54138787 is a deficient number, since it is larger than the sum of its proper divisors (1).

54138787 is an equidigital number, since it uses as much as digits as its factorization.

54138787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 43.

The square root of 54138787 is about 7357.9064277823. The cubic root of 54138787 is about 378.2998539896.

The spelling of 54138787 in words is "fifty-four million, one hundred thirty-eight thousand, seven hundred eighty-seven".