1994895169 has 2 divisors, whose sum is σ = 1994895170. Its totient is φ = 1994895168.

The previous prime is 1994895157. The next prime is 1994895187. The reversal of 1994895169 is 9615984991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1972692225 + 22202944 = 44415^2 + 4712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994895169 is a prime.

It is a super-2 number, since 2×1994895169² = 7959213470599077122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1994895109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997447584 + 997447585.

It is an arithmetic number, because the mean of its divisors is an integer number (997447585).

Almost surely, 2^1994895169 is an apocalyptic number.

It is an amenable number.

1994895169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994895169 is an equidigital number, since it uses as much as digits as its factorization.

1994895169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 61.

The square root of 1994895169 is about 44664.2493388168. The cubic root of 1994895169 is about 1258.8481892422.

The spelling of 1994895169 in words is "one billion, nine hundred ninety-four million, eight hundred ninety-five thousand, one hundred sixty-nine".