54538409 has 2 divisors, whose sum is σ = 54538410. Its totient is φ = 54538408.

The previous prime is 54538403. The next prime is 54538427. The reversal of 54538409 is 90483545.

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., 33120025 + 21418384 = 5755^2 + 4628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54538409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54538403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27269204 + 27269205.

It is an arithmetic number, because the mean of its divisors is an integer number (27269205).

Almost surely, 2^54538409 is an apocalyptic number.

It is an amenable number.

54538409 is a deficient number, since it is larger than the sum of its proper divisors (1).

54538409 is an equidigital number, since it uses as much as digits as its factorization.

54538409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 54538409 is about 7385.0124576740. The cubic root of 54538409 is about 379.2283718653.

The spelling of 54538409 in words is "fifty-four million, five hundred thirty-eight thousand, four hundred nine".