9791239898 has 36 divisors (see below), whose sum is σ = 16719620190. Its totient is φ = 4297006560.

The previous prime is 9791239873. The next prime is 9791239949. The reversal of 9791239898 is 8989321979.

It can be written as a sum of positive squares in 3 ways, for example, as 8707315969 + 1083923929 = 93313^2 + 32923^2 .

It is a Curzon number.

It is an unprimeable number.

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 in 17 ways as a sum of consecutive naturals, for example, 179468 + ... + 227576.

Almost surely, 2^9791239898 is an apocalyptic number.

9791239898 is a deficient number, since it is larger than the sum of its proper divisors (6928380292).

9791239898 is a wasteful number, since it uses less digits than its factorization.

9791239898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48191 (or 48151 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 65.

The square root of 9791239898 is about 98950.6942775037. The cubic root of 9791239898 is about 2139.3371384281.

The spelling of 9791239898 in words is "nine billion, seven hundred ninety-one million, two hundred thirty-nine thousand, eight hundred ninety-eight".