54459661 has 2 divisors, whose sum is σ = 54459662. Its totient is φ = 54459660.

The previous prime is 54459637. The next prime is 54459707. The reversal of 54459661 is 16695445.

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., 51753636 + 2706025 = 7194^2 + 1645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54459661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54459161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27229830 + 27229831.

It is an arithmetic number, because the mean of its divisors is an integer number (27229831).

Almost surely, 2^54459661 is an apocalyptic number.

It is an amenable number.

54459661 is a deficient number, since it is larger than the sum of its proper divisors (1).

54459661 is an equidigital number, since it uses as much as digits as its factorization.

54459661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 54459661 is about 7379.6789225548. The cubic root of 54459661 is about 379.0457613516.

The spelling of 54459661 in words is "fifty-four million, four hundred fifty-nine thousand, six hundred sixty-one".