53978257 has 2 divisors, whose sum is σ = 53978258. Its totient is φ = 53978256.

The previous prime is 53978237. The next prime is 53978293. The reversal of 53978257 is 75287935.

53978257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40844881 + 13133376 = 6391^2 + 3624^2 .

It is a cyclic number.

It is not a de Polignac number, because 53978257 - 2⁷ = 53978129 is a prime.

It is not a weakly prime, because it can be changed into another prime (53978237) 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, 26989128 + 26989129.

It is an arithmetic number, because the mean of its divisors is an integer number (26989129).

Almost surely, 2^53978257 is an apocalyptic number.

It is an amenable number.

53978257 is a deficient number, since it is larger than the sum of its proper divisors (1).

53978257 is an equidigital number, since it uses as much as digits as its factorization.

53978257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 53978257 is about 7346.9896556345. The cubic root of 53978257 is about 377.9255776703.

The spelling of 53978257 in words is "fifty-three million, nine hundred seventy-eight thousand, two hundred fifty-seven".