54478009 has 2 divisors, whose sum is σ = 54478010. Its totient is φ = 54478008.

The previous prime is 54478003. The next prime is 54478027. The reversal of 54478009 is 90087445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40602384 + 13875625 = 6372^2 + 3725^2 .

It is a cyclic number.

It is not a de Polignac number, because 54478009 - 2³ = 54478001 is a prime.

It is not a weakly prime, because it can be changed into another prime (54478001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27239004 + 27239005.

It is an arithmetic number, because the mean of its divisors is an integer number (27239005).

Almost surely, 2^54478009 is an apocalyptic number.

It is an amenable number.

54478009 is a deficient number, since it is larger than the sum of its proper divisors (1).

54478009 is an equidigital number, since it uses as much as digits as its factorization.

54478009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 54478009 is about 7380.9219613812. The cubic root of 54478009 is about 379.0883246643.

It can be divided in two parts, 5447 and 8009, that added together give a square (13456 = 116²).

The spelling of 54478009 in words is "fifty-four million, four hundred seventy-eight thousand, nine".