54929821 has 4 divisors (see below), whose sum is σ = 55547100. Its totient is φ = 54312544.

The previous prime is 54929801. The next prime is 54929837. The reversal of 54929821 is 12892945.

54929821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27941796 + 26988025 = 5286^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 54929821 - 2¹¹ = 54927773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54929801) 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 in 3 ways as a sum of consecutive naturals, for example, 308506 + ... + 308683.

It is an arithmetic number, because the mean of its divisors is an integer number (13886775).

Almost surely, 2^54929821 is an apocalyptic number.

It is an amenable number.

54929821 is a deficient number, since it is larger than the sum of its proper divisors (617279).

54929821 is an equidigital number, since it uses as much as digits as its factorization.

54929821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617278.

The product of its digits is 51840, while the sum is 40.

The square root of 54929821 is about 7411.4655096006. The cubic root of 54929821 is about 380.1334272908.

The spelling of 54929821 in words is "fifty-four million, nine hundred twenty-nine thousand, eight hundred twenty-one".