156823 has 2 divisors, whose sum is σ = 156824. Its totient is φ = 156822.

The previous prime is 156817. The next prime is 156833. The reversal of 156823 is 328651.

It is a happy number.

156823 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 (328651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156823 is a prime.

156823 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78411 + 78412.

It is an arithmetic number, because the mean of its divisors is an integer number (78412).

2¹⁵⁶⁸²³ is an apocalyptic number.

156823 is a deficient number, since it is larger than the sum of its proper divisors (1).

156823 is an equidigital number, since it uses as much as digits as its factorization.

156823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 156823 is about 396.0088382852. The cubic root of 156823 is about 53.9266264563.

It can be divided in two parts, 156 and 823, that added together give a palindrome (979).

The spelling of 156823 in words is "one hundred fifty-six thousand, eight hundred twenty-three".