213449693 has 2 divisors, whose sum is σ = 213449694. Its totient is φ = 213449692.

The previous prime is 213449609. The next prime is 213449711. The reversal of 213449693 is 396944312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212780569 + 669124 = 14587^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 213449693 - 2⁸ = 213449437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213449693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213449393) 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, 106724846 + 106724847.

It is an arithmetic number, because the mean of its divisors is an integer number (106724847).

Almost surely, 2^213449693 is an apocalyptic number.

It is an amenable number.

213449693 is a deficient number, since it is larger than the sum of its proper divisors (1).

213449693 is an equidigital number, since it uses as much as digits as its factorization.

213449693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 213449693 is about 14609.9176246822. The cubic root of 213449693 is about 597.6292495377.

The spelling of 213449693 in words is "two hundred thirteen million, four hundred forty-nine thousand, six hundred ninety-three".