54287809 has 2 divisors, whose sum is σ = 54287810. Its totient is φ = 54287808.

The previous prime is 54287791. The next prime is 54287819. The reversal of 54287809 is 90878245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50367409 + 3920400 = 7097^2 + 1980^2 .

It is a cyclic number.

It is not a de Polignac number, because 54287809 - 2⁹ = 54287297 is a prime.

It is not a weakly prime, because it can be changed into another prime (54287819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27143904 + 27143905.

It is an arithmetic number, because the mean of its divisors is an integer number (27143905).

Almost surely, 2^54287809 is an apocalyptic number.

It is an amenable number.

54287809 is a deficient number, since it is larger than the sum of its proper divisors (1).

54287809 is an equidigital number, since it uses as much as digits as its factorization.

54287809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 54287809 is about 7368.0261264466. The cubic root of 54287809 is about 378.6466377351.

The spelling of 54287809 in words is "fifty-four million, two hundred eighty-seven thousand, eight hundred nine".