156623 has 2 divisors, whose sum is σ = 156624. Its totient is φ = 156622.

The previous prime is 156619. The next prime is 156631. The reversal of 156623 is 326651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 156623 - 2² = 156619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78311 + 78312.

It is an arithmetic number, because the mean of its divisors is an integer number (78312).

2¹⁵⁶⁶²³ is an apocalyptic number.

156623 is a deficient number, since it is larger than the sum of its proper divisors (1).

156623 is an equidigital number, since it uses as much as digits as its factorization.

156623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 156623 is about 395.7562381062. The cubic root of 156623 is about 53.9036920791.

The spelling of 156623 in words is "one hundred fifty-six thousand, six hundred twenty-three".