54757921 has 2 divisors, whose sum is σ = 54757922. Its totient is φ = 54757920.

The previous prime is 54757907. The next prime is 54757939. The reversal of 54757921 is 12975745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33005025 + 21752896 = 5745^2 + 4664^2 .

It is a cyclic number.

It is not a de Polignac number, because 54757921 - 2⁵ = 54757889 is a prime.

It is not a weakly prime, because it can be changed into another prime (54757951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27378960 + 27378961.

It is an arithmetic number, because the mean of its divisors is an integer number (27378961).

Almost surely, 2^54757921 is an apocalyptic number.

It is an amenable number.

54757921 is a deficient number, since it is larger than the sum of its proper divisors (1).

54757921 is an equidigital number, since it uses as much as digits as its factorization.

54757921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The square root of 54757921 is about 7399.8595256937. The cubic root of 54757921 is about 379.7364770354.

It can be divided in two parts, 547579 and 21, that added together give a square (547600 = 740²).

The spelling of 54757921 in words is "fifty-four million, seven hundred fifty-seven thousand, nine hundred twenty-one".