54578987 has 2 divisors, whose sum is σ = 54578988. Its totient is φ = 54578986.

The previous prime is 54578981. The next prime is 54578989. The reversal of 54578987 is 78987545.

54578987 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 not a de Polignac number, because 54578987 - 2⁴ = 54578971 is a prime.

Together with 54578989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54578981) 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, 27289493 + 27289494.

It is an arithmetic number, because the mean of its divisors is an integer number (27289494).

Almost surely, 2^54578987 is an apocalyptic number.

54578987 is a deficient number, since it is larger than the sum of its proper divisors (1).

54578987 is an equidigital number, since it uses as much as digits as its factorization.

54578987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2822400, while the sum is 53.

The square root of 54578987 is about 7387.7592678701. The cubic root of 54578987 is about 379.3224004854.

The spelling of 54578987 in words is "fifty-four million, five hundred seventy-eight thousand, nine hundred eighty-seven".