54839021 has 2 divisors, whose sum is σ = 54839022. Its totient is φ = 54839020.

The previous prime is 54839011. The next prime is 54839033. The reversal of 54839021 is 12093845.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45414121 + 9424900 = 6739^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 54839021 - 2¹⁰ = 54837997 is a prime.

It is a Chen prime.

It is equal to p_3273188 and since 54839021 and 3273188 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54839011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27419510 + 27419511.

It is an arithmetic number, because the mean of its divisors is an integer number (27419511).

Almost surely, 2^54839021 is an apocalyptic number.

It is an amenable number.

54839021 is a deficient number, since it is larger than the sum of its proper divisors (1).

54839021 is an equidigital number, since it uses as much as digits as its factorization.

54839021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 54839021 is about 7405.3373319519. The cubic root of 54839021 is about 379.9238559345.

The spelling of 54839021 in words is "fifty-four million, eight hundred thirty-nine thousand, twenty-one".