54297809 has 2 divisors, whose sum is σ = 54297810. Its totient is φ = 54297808.

The previous prime is 54297799. The next prime is 54297821. The reversal of 54297809 is 90879245.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48344209 + 5953600 = 6953^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 54297809 - 2¹⁶ = 54232273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54297809.

It is not a weakly prime, because it can be changed into another prime (54297829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27148904 + 27148905.

It is an arithmetic number, because the mean of its divisors is an integer number (27148905).

Almost surely, 2^54297809 is an apocalyptic number.

It is an amenable number.

54297809 is a deficient number, since it is larger than the sum of its proper divisors (1).

54297809 is an equidigital number, since it uses as much as digits as its factorization.

54297809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 54297809 is about 7368.7047029990. The cubic root of 54297809 is about 378.6698856428.

The spelling of 54297809 in words is "fifty-four million, two hundred ninety-seven thousand, eight hundred nine".