53861 has 2 divisors, whose sum is σ = 53862. Its totient is φ = 53860.

The previous prime is 53857. The next prime is 53881. The reversal of 53861 is 16835.

53861 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., 52900 + 961 = 230^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 53861 - 2² = 53857 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 (53831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26930 + 26931.

It is an arithmetic number, because the mean of its divisors is an integer number (26931).

2⁵³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

53861 is a deficient number, since it is larger than the sum of its proper divisors (1).

53861 is an equidigital number, since it uses as much as digits as its factorization.

53861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 53861 is about 232.0797276800. The cubic root of 53861 is about 37.7651723290.

The spelling of 53861 in words is "fifty-three thousand, eight hundred sixty-one".