54721949 has 4 divisors (see below), whose sum is σ = 54749760. Its totient is φ = 54694140.

The previous prime is 54721939. The next prime is 54721981. The reversal of 54721949 is 94912745.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54721949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54721939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10709 + ... + 14970.

It is an arithmetic number, because the mean of its divisors is an integer number (13687440).

Almost surely, 2^54721949 is an apocalyptic number.

It is an amenable number.

54721949 is a deficient number, since it is larger than the sum of its proper divisors (27811).

54721949 is a wasteful number, since it uses less digits than its factorization.

54721949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27810.

The product of its digits is 90720, while the sum is 41.

The square root of 54721949 is about 7397.4285397022. The cubic root of 54721949 is about 379.6533056721.

The spelling of 54721949 in words is "fifty-four million, seven hundred twenty-one thousand, nine hundred forty-nine".