213912903361693 has 2 divisors, whose sum is σ = 213912903361694. Its totient is φ = 213912903361692.

The previous prime is 213912903361657. The next prime is 213912903361811. The reversal of 213912903361693 is 396163309219312.

It is a happy number.

213912903361693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127146416950084 + 86766486411609 = 11275922^2 + 9314853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213912903361693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213912903361093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106956451680846 + 106956451680847.

It is an arithmetic number, because the mean of its divisors is an integer number (106956451680847).

Almost surely, 2^{213912903361693} is an apocalyptic number.

It is an amenable number.

213912903361693 is a deficient number, since it is larger than the sum of its proper divisors (1).

213912903361693 is an equidigital number, since it uses as much as digits as its factorization.

213912903361693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8503056, while the sum is 58.

The spelling of 213912903361693 in words is "two hundred thirteen trillion, nine hundred twelve billion, nine hundred three million, three hundred sixty-one thousand, six hundred ninety-three".