219880339409 has 2 divisors, whose sum is σ = 219880339410. Its totient is φ = 219880339408.

The previous prime is 219880339373. The next prime is 219880339423. The reversal of 219880339409 is 904933088912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134741853184 + 85138486225 = 367072^2 + 291785^2 .

It is a cyclic number.

It is not a de Polignac number, because 219880339409 - 2²⁰ = 219879290833 is a prime.

It is not a weakly prime, because it can be changed into another prime (219880339439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109940169704 + 109940169705.

It is an arithmetic number, because the mean of its divisors is an integer number (109940169705).

Almost surely, 2^219880339409 is an apocalyptic number.

It is an amenable number.

219880339409 is a deficient number, since it is larger than the sum of its proper divisors (1).

219880339409 is an equidigital number, since it uses as much as digits as its factorization.

219880339409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 219880339409 in words is "two hundred nineteen billion, eight hundred eighty million, three hundred thirty-nine thousand, four hundred nine".