53908321 has 2 divisors, whose sum is σ = 53908322. Its totient is φ = 53908320.

The previous prime is 53908291. The next prime is 53908331. The reversal of 53908321 is 12380935.

It is a happy number.

53908321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42719296 + 11189025 = 6536^2 + 3345^2 .

It is a cyclic number.

It is not a de Polignac number, because 53908321 - 2⁵ = 53908289 is a prime.

It is a super-2 number, since 2×53908321² = 5812214146078082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53908331) 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 as a sum of consecutive naturals, namely, 26954160 + 26954161.

It is an arithmetic number, because the mean of its divisors is an integer number (26954161).

Almost surely, 2^53908321 is an apocalyptic number.

It is an amenable number.

53908321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53908321 is an equidigital number, since it uses as much as digits as its factorization.

53908321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 53908321 is about 7342.2286126216. The cubic root of 53908321 is about 377.7622895387.

The spelling of 53908321 in words is "fifty-three million, nine hundred eight thousand, three hundred twenty-one".