53986021 has 2 divisors, whose sum is σ = 53986022. Its totient is φ = 53986020.

The previous prime is 53985989. The next prime is 53986039. The reversal of 53986021 is 12068935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44289025 + 9696996 = 6655^2 + 3114^2 .

It is a cyclic number.

It is not a de Polignac number, because 53986021 - 2⁵ = 53985989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53986091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26993010 + 26993011.

It is an arithmetic number, because the mean of its divisors is an integer number (26993011).

Almost surely, 2^53986021 is an apocalyptic number.

It is an amenable number.

53986021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53986021 is an equidigital number, since it uses as much as digits as its factorization.

53986021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 53986021 is about 7347.5180163100. The cubic root of 53986021 is about 377.9436965308.

The spelling of 53986021 in words is "fifty-three million, nine hundred eighty-six thousand, twenty-one".