1921073007827 has 2 divisors, whose sum is σ = 1921073007828. Its totient is φ = 1921073007826.

The previous prime is 1921073007773. The next prime is 1921073007829. The reversal of 1921073007827 is 7287003701291.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1921073007827 is a prime.

Together with 1921073007829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1921073007829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960536503913 + 960536503914.

It is an arithmetic number, because the mean of its divisors is an integer number (960536503914).

Almost surely, 2^{1921073007827} is an apocalyptic number.

1921073007827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921073007827 is an equidigital number, since it uses as much as digits as its factorization.

1921073007827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 47.

The spelling of 1921073007827 in words is "one trillion, nine hundred twenty-one billion, seventy-three million, seven thousand, eight hundred twenty-seven".