1219997786933 has 2 divisors, whose sum is σ = 1219997786934. Its totient is φ = 1219997786932.

The previous prime is 1219997786929. The next prime is 1219997787007. The reversal of 1219997786933 is 3396877999121.

It is an a-pointer prime, because the next prime (1219997787007) can be obtained adding 1219997786933 to its sum of digits (74).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 746223000964 + 473774785969 = 863842^2 + 688313^2 .

It is a cyclic number.

It is not a de Polignac number, because 1219997786933 - 2² = 1219997786929 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1219997782933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609998893466 + 609998893467.

It is an arithmetic number, because the mean of its divisors is an integer number (609998893467).

Almost surely, 2^{1219997786933} is an apocalyptic number.

It is an amenable number.

1219997786933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219997786933 is an equidigital number, since it uses as much as digits as its factorization.

1219997786933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 277766496, while the sum is 74.

The spelling of 1219997786933 in words is "one trillion, two hundred nineteen billion, nine hundred ninety-seven million, seven hundred eighty-six thousand, nine hundred thirty-three".