213432023789 has 2 divisors, whose sum is σ = 213432023790. Its totient is φ = 213432023788.

The previous prime is 213432023743. The next prime is 213432023821. The reversal of 213432023789 is 987320234312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182713502500 + 30718521289 = 427450^2 + 175267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213432023789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213432023719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106716011894 + 106716011895.

It is an arithmetic number, because the mean of its divisors is an integer number (106716011895).

Almost surely, 2^213432023789 is an apocalyptic number.

It is an amenable number.

213432023789 is a deficient number, since it is larger than the sum of its proper divisors (1).

213432023789 is an equidigital number, since it uses as much as digits as its factorization.

213432023789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 213432023789 in words is "two hundred thirteen billion, four hundred thirty-two million, twenty-three thousand, seven hundred eighty-nine".