213923 has 8 divisors (see below), whose sum is σ = 228096. Its totient is φ = 200200.

The previous prime is 213919. The next prime is 213929. The reversal of 213923 is 329312.

213923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213923 - 2² = 213919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213895 and 213904.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213923.

It is not an unprimeable number, because it can be changed into a prime (213929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1568 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (28512).

2²¹³⁹²³ is an apocalyptic number.

213923 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213923 is a deficient number, since it is larger than the sum of its proper divisors (14173).

213923 is a wasteful number, since it uses less digits than its factorization.

213923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225.

The product of its digits is 324, while the sum is 20.

The square root of 213923 is about 462.5181077536. The cubic root of 213923 is about 59.8070654545.

The spelling of 213923 in words is "two hundred thirteen thousand, nine hundred twenty-three".