54456989 has 2 divisors, whose sum is σ = 54456990. Its totient is φ = 54456988.

The previous prime is 54456971. The next prime is 54457057. The reversal of 54456989 is 98965445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 3833764 = 7115^2 + 1958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54456989 is a prime.

It is a super-2 number, since 2×54456989² = 5931127301892242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54456949) 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, 27228494 + 27228495.

It is an arithmetic number, because the mean of its divisors is an integer number (27228495).

Almost surely, 2^54456989 is an apocalyptic number.

It is an amenable number.

54456989 is a deficient number, since it is larger than the sum of its proper divisors (1).

54456989 is an equidigital number, since it uses as much as digits as its factorization.

54456989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 50.

The square root of 54456989 is about 7379.4978826476. The cubic root of 54456989 is about 379.0395621036.

The spelling of 54456989 in words is "fifty-four million, four hundred fifty-six thousand, nine hundred eighty-nine".