1973894695811 has 2 divisors, whose sum is σ = 1973894695812. Its totient is φ = 1973894695810.

The previous prime is 1973894695793. The next prime is 1973894695813. The reversal of 1973894695811 is 1185964983791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1973894695811 is a prime.

Together with 1973894695813, 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 (1973894695813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986947347905 + 986947347906.

It is an arithmetic number, because the mean of its divisors is an integer number (986947347906).

Almost surely, 2^{1973894695811} is an apocalyptic number.

1973894695811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973894695811 is an equidigital number, since it uses as much as digits as its factorization.

1973894695811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 71.

The spelling of 1973894695811 in words is "one trillion, nine hundred seventy-three billion, eight hundred ninety-four million, six hundred ninety-five thousand, eight hundred eleven".