101623 has 4 divisors (see below), whose sum is σ = 102448. Its totient is φ = 100800.

The previous prime is 101611. The next prime is 101627. The reversal of 101623 is 326101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 101623 - 2⁹ = 101111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101627) 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 in 3 ways as a sum of consecutive naturals, for example, 186 + ... + 487.

It is an arithmetic number, because the mean of its divisors is an integer number (25612).

2¹⁰¹⁶²³ is an apocalyptic number.

101623 is a deficient number, since it is larger than the sum of its proper divisors (825).

101623 is an equidigital number, since it uses as much as digits as its factorization.

101623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 101623 is about 318.7836256774. The cubic root of 101623 is about 46.6656519054.

Adding to 101623 its reverse (326101), we get a palindrome (427724).

The spelling of 101623 in words is "one hundred one thousand, six hundred twenty-three".