53819861 has 2 divisors, whose sum is σ = 53819862. Its totient is φ = 53819860.

The previous prime is 53819851. The next prime is 53819881. The reversal of 53819861 is 16891835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 442225 = 7306^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 53819861 - 2¹⁰ = 53818837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53819851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26909930 + 26909931.

It is an arithmetic number, because the mean of its divisors is an integer number (26909931).

Almost surely, 2^53819861 is an apocalyptic number.

It is an amenable number.

53819861 is a deficient number, since it is larger than the sum of its proper divisors (1).

53819861 is an equidigital number, since it uses as much as digits as its factorization.

53819861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 53819861 is about 7336.2020828219. The cubic root of 53819861 is about 377.5555487457. Note that the first 4 decimals are identical.

The spelling of 53819861 in words is "fifty-three million, eight hundred nineteen thousand, eight hundred sixty-one".