1219891033 has 2 divisors, whose sum is σ = 1219891034. Its totient is φ = 1219891032.

The previous prime is 1219891019. The next prime is 1219891051. The reversal of 1219891033 is 3301989121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032529689 + 187361344 = 32133^2 + 13688^2 .

It is an emirp because it is prime and its reverse (3301989121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1219891033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1219890983 and 1219891001.

It is not a weakly prime, because it can be changed into another prime (1219898033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609945516 + 609945517.

It is an arithmetic number, because the mean of its divisors is an integer number (609945517).

Almost surely, 2^1219891033 is an apocalyptic number.

It is an amenable number.

1219891033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219891033 is an equidigital number, since it uses as much as digits as its factorization.

1219891033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1219891033 is about 34926.9385002465. The cubic root of 1219891033 is about 1068.4979165025.

The spelling of 1219891033 in words is "one billion, two hundred nineteen million, eight hundred ninety-one thousand, thirty-three".