1219329361 has 2 divisors, whose sum is σ = 1219329362. Its totient is φ = 1219329360.

The previous prime is 1219329359. The next prime is 1219329401. The reversal of 1219329361 is 1639239121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620010000 + 599319361 = 24900^2 + 24481^2 .

It is a cyclic number.

It is not a de Polignac number, because 1219329361 - 2¹ = 1219329359 is a prime.

Together with 1219329359, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1219329361.

It is not a weakly prime, because it can be changed into another prime (1219329311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609664680 + 609664681.

It is an arithmetic number, because the mean of its divisors is an integer number (609664681).

Almost surely, 2^1219329361 is an apocalyptic number.

It is an amenable number.

1219329361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219329361 is an equidigital number, since it uses as much as digits as its factorization.

1219329361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 1219329361 is about 34918.8969041120. The cubic root of 1219329361 is about 1068.3339025381. Note that the first 3 decimals are identical.

The spelling of 1219329361 in words is "one billion, two hundred nineteen million, three hundred twenty-nine thousand, three hundred sixty-one".