213892493 has 2 divisors, whose sum is σ = 213892494. Its totient is φ = 213892492.

The previous prime is 213892463. The next prime is 213892501. The reversal of 213892493 is 394298312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109893289 + 103999204 = 10483^2 + 10198^2 .

It is a cyclic number.

It is not a de Polignac number, because 213892493 - 2¹⁶ = 213826957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213892493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213892403) 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, 106946246 + 106946247.

It is an arithmetic number, because the mean of its divisors is an integer number (106946247).

Almost surely, 2^213892493 is an apocalyptic number.

It is an amenable number.

213892493 is a deficient number, since it is larger than the sum of its proper divisors (1).

213892493 is an equidigital number, since it uses as much as digits as its factorization.

213892493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 213892493 is about 14625.0638631084. The cubic root of 213892493 is about 598.0422234292.

The spelling of 213892493 in words is "two hundred thirteen million, eight hundred ninety-two thousand, four hundred ninety-three".