213674643239 has 2 divisors, whose sum is σ = 213674643240. Its totient is φ = 213674643238.

The previous prime is 213674643187. The next prime is 213674643253. The reversal of 213674643239 is 932346476312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213674643239 - 2²⁰ = 213673594663 is a prime.

It is a super-2 number, since 2×213674643239² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213674646239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106837321619 + 106837321620.

It is an arithmetic number, because the mean of its divisors is an integer number (106837321620).

Almost surely, 2^213674643239 is an apocalyptic number.

213674643239 is a deficient number, since it is larger than the sum of its proper divisors (1).

213674643239 is an equidigital number, since it uses as much as digits as its factorization.

213674643239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 50.

The spelling of 213674643239 in words is "two hundred thirteen billion, six hundred seventy-four million, six hundred forty-three thousand, two hundred thirty-nine".