1994996424929 has 2 divisors, whose sum is σ = 1994996424930. Its totient is φ = 1994996424928.

The previous prime is 1994996424871. The next prime is 1994996424983. The reversal of 1994996424929 is 9294246994991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1742664010000 + 252332414929 = 1320100^2 + 502327^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994996424929 - 2⁴⁰ = 895484797153 is a prime.

It is a super-2 number, since 2×1994996424929² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1994996424929.

It is not a weakly prime, because it can be changed into another prime (1994996424829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997498212464 + 997498212465.

It is an arithmetic number, because the mean of its divisors is an integer number (997498212465).

Almost surely, 2^{1994996424929} is an apocalyptic number.

It is an amenable number.

1994996424929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994996424929 is an equidigital number, since it uses as much as digits as its factorization.

1994996424929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816293376, while the sum is 77.

The spelling of 1994996424929 in words is "one trillion, nine hundred ninety-four billion, nine hundred ninety-six million, four hundred twenty-four thousand, nine hundred twenty-nine".