219078061 has 2 divisors, whose sum is σ = 219078062. Its totient is φ = 219078060.

The previous prime is 219078043. The next prime is 219078107. The reversal of 219078061 is 160870912.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192349161 + 26728900 = 13869^2 + 5170^2 .

It is a cyclic number.

It is not a de Polignac number, because 219078061 - 2⁹ = 219077549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219078001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109539030 + 109539031.

It is an arithmetic number, because the mean of its divisors is an integer number (109539031).

Almost surely, 2^219078061 is an apocalyptic number.

It is an amenable number.

219078061 is a deficient number, since it is larger than the sum of its proper divisors (1).

219078061 is an equidigital number, since it uses as much as digits as its factorization.

219078061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 219078061 is about 14801.2857887415. The cubic root of 219078061 is about 602.8366246155.

The spelling of 219078061 in words is "two hundred nineteen million, seventy-eight thousand, sixty-one".