213123539 has 2 divisors, whose sum is σ = 213123540. Its totient is φ = 213123538.

The previous prime is 213123511. The next prime is 213123571. The reversal of 213123539 is 935321312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213123539 - 2⁸ = 213123283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213123439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106561769 + 106561770.

It is an arithmetic number, because the mean of its divisors is an integer number (106561770).

Almost surely, 2^213123539 is an apocalyptic number.

213123539 is a deficient number, since it is larger than the sum of its proper divisors (1).

213123539 is an equidigital number, since it uses as much as digits as its factorization.

213123539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 29.

The square root of 213123539 is about 14598.7512822159. The cubic root of 213123539 is about 597.3246991906.

The spelling of 213123539 in words is "two hundred thirteen million, one hundred twenty-three thousand, five hundred thirty-nine".