213859123 has 2 divisors, whose sum is σ = 213859124. Its totient is φ = 213859122.

The previous prime is 213859103. The next prime is 213859127. The reversal of 213859123 is 321958312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213859123 - 2⁹ = 213858611 is a prime.

It is not a weakly prime, because it can be changed into another prime (213859127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106929561 + 106929562.

It is an arithmetic number, because the mean of its divisors is an integer number (106929562).

Almost surely, 2^213859123 is an apocalyptic number.

213859123 is a deficient number, since it is larger than the sum of its proper divisors (1).

213859123 is an equidigital number, since it uses as much as digits as its factorization.

213859123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 213859123 is about 14623.9229688890. The cubic root of 213859123 is about 598.0111210334.

The spelling of 213859123 in words is "two hundred thirteen million, eight hundred fifty-nine thousand, one hundred twenty-three".