213904423 has 2 divisors, whose sum is σ = 213904424. Its totient is φ = 213904422.

The previous prime is 213904417. The next prime is 213904519. The reversal of 213904423 is 324409312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213904423 - 2⁵ = 213904391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213904391 and 213904400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213934423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106952211 + 106952212.

It is an arithmetic number, because the mean of its divisors is an integer number (106952212).

Almost surely, 2^213904423 is an apocalyptic number.

213904423 is a deficient number, since it is larger than the sum of its proper divisors (1).

213904423 is an equidigital number, since it uses as much as digits as its factorization.

213904423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 213904423 is about 14625.4717188882. The cubic root of 213904423 is about 598.0533419604.

The spelling of 213904423 in words is "two hundred thirteen million, nine hundred four thousand, four hundred twenty-three".