213420644939 has 2 divisors, whose sum is σ = 213420644940. Its totient is φ = 213420644938.

The previous prime is 213420644887. The next prime is 213420644947. The reversal of 213420644939 is 939446024312.

213420644939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213420644939 - 2³² = 209125677643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213420644893 and 213420644902.

It is not a weakly prime, because it can be changed into another prime (213420644039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106710322469 + 106710322470.

It is an arithmetic number, because the mean of its divisors is an integer number (106710322470).

Almost surely, 2^213420644939 is an apocalyptic number.

213420644939 is a deficient number, since it is larger than the sum of its proper divisors (1).

213420644939 is an equidigital number, since it uses as much as digits as its factorization.

213420644939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 213420644939 in words is "two hundred thirteen billion, four hundred twenty million, six hundred forty-four thousand, nine hundred thirty-nine".