981794497189 has 6 divisors (see below), whose sum is σ = 1079162546630. Its totient is φ = 892540451880.

The previous prime is 981794497171. The next prime is 981794497213.

981794497189 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 772175200225 + 209619296964 = 878735^2 + 457842^2 .

It is not a de Polignac number, because 981794497189 - 2²⁷ = 981660279461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981794491189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4057001934 + ... + 4057002175.

Almost surely, 2^981794497189 is an apocalyptic number.

It is an amenable number.

981794497189 is a deficient number, since it is larger than the sum of its proper divisors (97368049441).

981794497189 is a wasteful number, since it uses less digits than its factorization.

981794497189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114004131 (or 8114004120 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 76.

The spelling of 981794497189 in words is "nine hundred eighty-one billion, seven hundred ninety-four million, four hundred ninety-seven thousand, one hundred eighty-nine".