155863 has 2 divisors, whose sum is σ = 155864. Its totient is φ = 155862.

The previous prime is 155861. The next prime is 155887. The reversal of 155863 is 368551.

155863 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 is an emirp because it is prime and its reverse (368551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155863 - 2¹ = 155861 is a prime.

Together with 155861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77931 + 77932.

It is an arithmetic number, because the mean of its divisors is an integer number (77932).

2¹⁵⁵⁸⁶³ is an apocalyptic number.

155863 is a deficient number, since it is larger than the sum of its proper divisors (1).

155863 is an equidigital number, since it uses as much as digits as its factorization.

155863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 155863 is about 394.7948834522. The cubic root of 155863 is about 53.8163629558.

The spelling of 155863 in words is "one hundred fifty-five thousand, eight hundred sixty-three".