1921483728499 has 2 divisors, whose sum is σ = 1921483728500. Its totient is φ = 1921483728498.

The previous prime is 1921483728413. The next prime is 1921483728509. The reversal of 1921483728499 is 9948273841291.

It is a strong prime.

It is an emirp because it is prime and its reverse (9948273841291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1921483728499 - 2⁹ = 1921483727987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1921583728499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960741864249 + 960741864250.

It is an arithmetic number, because the mean of its divisors is an integer number (960741864250).

Almost surely, 2^{1921483728499} is an apocalyptic number.

1921483728499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921483728499 is an equidigital number, since it uses as much as digits as its factorization.

1921483728499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 67.

The spelling of 1921483728499 in words is "one trillion, nine hundred twenty-one billion, four hundred eighty-three million, seven hundred twenty-eight thousand, four hundred ninety-nine".