54249809 has 2 divisors, whose sum is σ = 54249810. Its totient is φ = 54249808.

The previous prime is 54249787. The next prime is 54249817. The reversal of 54249809 is 90894245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 3341584 = 7135^2 + 1828^2 .

It is a cyclic number.

It is not a de Polignac number, because 54249809 - 2⁸ = 54249553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (54249889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27124904 + 27124905.

It is an arithmetic number, because the mean of its divisors is an integer number (27124905).

Almost surely, 2^54249809 is an apocalyptic number.

It is an amenable number.

54249809 is a deficient number, since it is larger than the sum of its proper divisors (1).

54249809 is an equidigital number, since it uses as much as digits as its factorization.

54249809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 54249809 is about 7365.4469653918. The cubic root of 54249809 is about 378.5582696404.

The spelling of 54249809 in words is "fifty-four million, two hundred forty-nine thousand, eight hundred nine".