54613721 has 2 divisors, whose sum is σ = 54613722. Its totient is φ = 54613720.

The previous prime is 54613679. The next prime is 54613729. The reversal of 54613721 is 12731645.

54613721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 9388096 = 6725^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 54613721 - 2²² = 50419417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54613729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27306860 + 27306861.

It is an arithmetic number, because the mean of its divisors is an integer number (27306861).

Almost surely, 2^54613721 is an apocalyptic number.

It is an amenable number.

54613721 is a deficient number, since it is larger than the sum of its proper divisors (1).

54613721 is an equidigital number, since it uses as much as digits as its factorization.

54613721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 29.

The square root of 54613721 is about 7390.1096744230. The cubic root of 54613721 is about 379.4028501910.

The spelling of 54613721 in words is "fifty-four million, six hundred thirteen thousand, seven hundred twenty-one".