219384493 has 2 divisors, whose sum is σ = 219384494. Its totient is φ = 219384492.

The previous prime is 219384467. The next prime is 219384497. The reversal of 219384493 is 394483912.

219384493 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 can be written as a sum of positive squares in only one way, i.e., 178142409 + 41242084 = 13347^2 + 6422^2 .

It is a cyclic number.

It is not a de Polignac number, because 219384493 - 2⁵ = 219384461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219384497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109692246 + 109692247.

It is an arithmetic number, because the mean of its divisors is an integer number (109692247).

Almost surely, 2^219384493 is an apocalyptic number.

It is an amenable number.

219384493 is a deficient number, since it is larger than the sum of its proper divisors (1).

219384493 is an equidigital number, since it uses as much as digits as its factorization.

219384493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 219384493 is about 14811.6337046256. The cubic root of 219384493 is about 603.1175630930.

The spelling of 219384493 in words is "two hundred nineteen million, three hundred eighty-four thousand, four hundred ninety-three".