1219109413 has 2 divisors, whose sum is σ = 1219109414. Its totient is φ = 1219109412.

The previous prime is 1219109387. The next prime is 1219109443. The reversal of 1219109413 is 3149019121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218917569 + 191844 = 34913^2 + 438^2 .

It is an emirp because it is prime and its reverse (3149019121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1219109413 - 2²¹ = 1217012261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1219109443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609554706 + 609554707.

It is an arithmetic number, because the mean of its divisors is an integer number (609554707).

Almost surely, 2^1219109413 is an apocalyptic number.

It is an amenable number.

1219109413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219109413 is an equidigital number, since it uses as much as digits as its factorization.

1219109413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1219109413 is about 34915.7473498707. The cubic root of 1219109413 is about 1068.2696617505.

The spelling of 1219109413 in words is "one billion, two hundred nineteen million, one hundred nine thousand, four hundred thirteen".