1220001619 has 2 divisors, whose sum is σ = 1220001620. Its totient is φ = 1220001618.

The previous prime is 1220001611. The next prime is 1220001641. The reversal of 1220001619 is 9161000221.

It is an a-pointer prime, because the next prime (1220001641) can be obtained adding 1220001619 to its sum of digits (22).

It is a weak prime.

It is an emirp because it is prime and its reverse (9161000221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220001619 - 2³ = 1220001611 is a prime.

It is a super-2 number, since 2×1220001619² = 2976807900725242322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220001619.

It is not a weakly prime, because it can be changed into another prime (1220001611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610000809 + 610000810.

It is an arithmetic number, because the mean of its divisors is an integer number (610000810).

Almost surely, 2^1220001619 is an apocalyptic number.

1220001619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220001619 is an equidigital number, since it uses as much as digits as its factorization.

1220001619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1220001619 is about 34928.5215690559. The cubic root of 1220001619 is about 1068.5302028125.

The spelling of 1220001619 in words is "one billion, two hundred twenty million, one thousand, six hundred nineteen".