1994337979171 has 2 divisors, whose sum is σ = 1994337979172. Its totient is φ = 1994337979170.

The previous prime is 1994337979121. The next prime is 1994337979237. The reversal of 1994337979171 is 1719797334991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1994337979171 - 2²⁷ = 1994203761443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1994337979171.

It is not a weakly prime, because it can be changed into another prime (1994337979121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997168989585 + 997168989586.

It is an arithmetic number, because the mean of its divisors is an integer number (997168989586).

Almost surely, 2^{1994337979171} is an apocalyptic number.

1994337979171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994337979171 is an equidigital number, since it uses as much as digits as its factorization.

1994337979171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81015228, while the sum is 70.

The spelling of 1994337979171 in words is "one trillion, nine hundred ninety-four billion, three hundred thirty-seven million, nine hundred seventy-nine thousand, one hundred seventy-one".