219388093 has 2 divisors, whose sum is σ = 219388094. Its totient is φ = 219388092.

The previous prime is 219388087. The next prime is 219388097. The reversal of 219388093 is 390883912.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213247609 + 6140484 = 14603^2 + 2478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219388093 is a prime.

It is a super-2 number, since 2×219388093² = 96262270700353298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219388097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109694046 + 109694047.

It is an arithmetic number, because the mean of its divisors is an integer number (109694047).

Almost surely, 2^219388093 is an apocalyptic number.

It is an amenable number.

219388093 is a deficient number, since it is larger than the sum of its proper divisors (1).

219388093 is an equidigital number, since it uses as much as digits as its factorization.

219388093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 219388093 is about 14811.7552302217. The cubic root of 219388093 is about 603.1208620368.

The spelling of 219388093 in words is "two hundred nineteen million, three hundred eighty-eight thousand, ninety-three".