981096193009 has 3 divisors (see below), whose sum is σ = 981097183513. Its totient is φ = 981095202506.

The previous prime is 981096192953. The next prime is 981096193031. The reversal of 981096193009 is 900391690189.

The square root of 981096193009 is 990503.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 981096193009 - 2⁹ = 981096192497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981096193069) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 495252 + ... + 1485754.

Almost surely, 2^981096193009 is an apocalyptic number.

981096193009 is the 990503-rd square number.

981096193009 is the 495252-nd centered octagonal number.

It is an amenable number.

981096193009 is a deficient number, since it is larger than the sum of its proper divisors (990504).

981096193009 is an frugal number, since it uses more digits than its factorization.

981096193009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981006 (or 990503 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 55.

The spelling of 981096193009 in words is "nine hundred eighty-one billion, ninety-six million, one hundred ninety-three thousand, nine".