53768021 has 2 divisors, whose sum is σ = 53768022. Its totient is φ = 53768020.

The previous prime is 53768003. The next prime is 53768051. The reversal of 53768021 is 12086735.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 26152996 = 5255^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 53768021 - 2¹⁰ = 53766997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53768051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26884010 + 26884011.

It is an arithmetic number, because the mean of its divisors is an integer number (26884011).

Almost surely, 2^53768021 is an apocalyptic number.

It is an amenable number.

53768021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53768021 is an equidigital number, since it uses as much as digits as its factorization.

53768021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 53768021 is about 7332.6680683091. The cubic root of 53768021 is about 377.4342876424.

The spelling of 53768021 in words is "fifty-three million, seven hundred sixty-eight thousand, twenty-one".