54787321 has 2 divisors, whose sum is σ = 54787322. Its totient is φ = 54787320.

The previous prime is 54787273. The next prime is 54787331. The reversal of 54787321 is 12378745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38303721 + 16483600 = 6189^2 + 4060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54787321 is a prime.

It is not a weakly prime, because it can be changed into another prime (54787331) 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, 27393660 + 27393661.

It is an arithmetic number, because the mean of its divisors is an integer number (27393661).

Almost surely, 2^54787321 is an apocalyptic number.

It is an amenable number.

54787321 is a deficient number, since it is larger than the sum of its proper divisors (1).

54787321 is an equidigital number, since it uses as much as digits as its factorization.

54787321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 54787321 is about 7401.8457833165. The cubic root of 54787321 is about 379.8044261391.

The spelling of 54787321 in words is "fifty-four million, seven hundred eighty-seven thousand, three hundred twenty-one".