213785423 has 2 divisors, whose sum is σ = 213785424. Its totient is φ = 213785422.

The previous prime is 213785389. The next prime is 213785431. The reversal of 213785423 is 324587312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213785423 - 2⁸ = 213785167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213782423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106892711 + 106892712.

It is an arithmetic number, because the mean of its divisors is an integer number (106892712).

Almost surely, 2^213785423 is an apocalyptic number.

213785423 is a deficient number, since it is larger than the sum of its proper divisors (1).

213785423 is an equidigital number, since it uses as much as digits as its factorization.

213785423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The square root of 213785423 is about 14621.4029080660. The cubic root of 213785423 is about 597.9424177319.

The spelling of 213785423 in words is "two hundred thirteen million, seven hundred eighty-five thousand, four hundred twenty-three".