54659721 has 8 divisors (see below), whose sum is σ = 74074624. Its totient is φ = 35842320.

The previous prime is 54659719. The next prime is 54659729. The reversal of 54659721 is 12795645.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 54659721 - 2¹ = 54659719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54659721.

It is not an unprimeable number, because it can be changed into a prime (54659729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149161 + ... + 149526.

It is an arithmetic number, because the mean of its divisors is an integer number (9259328).

Almost surely, 2^54659721 is an apocalyptic number.

It is an amenable number.

54659721 is a deficient number, since it is larger than the sum of its proper divisors (19414903).

54659721 is a wasteful number, since it uses less digits than its factorization.

54659721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298751.

The product of its digits is 75600, while the sum is 39.

The square root of 54659721 is about 7393.2212870981. The cubic root of 54659721 is about 379.5093413383.

The spelling of 54659721 in words is "fifty-four million, six hundred fifty-nine thousand, seven hundred twenty-one".