213403423 has 2 divisors, whose sum is σ = 213403424. Its totient is φ = 213403422.

The previous prime is 213403417. The next prime is 213403427. The reversal of 213403423 is 324304312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213403423 - 2⁵ = 213403391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213403394 and 213403403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213403427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106701711 + 106701712.

It is an arithmetic number, because the mean of its divisors is an integer number (106701712).

Almost surely, 2^213403423 is an apocalyptic number.

213403423 is a deficient number, since it is larger than the sum of its proper divisors (1).

213403423 is an equidigital number, since it uses as much as digits as its factorization.

213403423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 213403423 is about 14608.3340254801. The cubic root of 213403423 is about 597.5860632435.

Adding to 213403423 its reverse (324304312), we get a palindrome (537707735).

The spelling of 213403423 in words is "two hundred thirteen million, four hundred three thousand, four hundred twenty-three".