54581987 has 2 divisors, whose sum is σ = 54581988. Its totient is φ = 54581986.

The previous prime is 54581981. The next prime is 54581999. The reversal of 54581987 is 78918545.

54581987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54581987 is a prime.

It is not a weakly prime, because it can be changed into another prime (54581981) 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, 27290993 + 27290994.

It is an arithmetic number, because the mean of its divisors is an integer number (27290994).

Almost surely, 2^54581987 is an apocalyptic number.

54581987 is a deficient number, since it is larger than the sum of its proper divisors (1).

54581987 is an equidigital number, since it uses as much as digits as its factorization.

54581987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 47.

The square root of 54581987 is about 7387.9623036396. The cubic root of 54581987 is about 379.3293503295.

The spelling of 54581987 in words is "fifty-four million, five hundred eighty-one thousand, nine hundred eighty-seven".