9139997798 has 4 divisors (see below), whose sum is σ = 13709996700. Its totient is φ = 4569998898.

The previous prime is 9139997753. The next prime is 9139997821. The reversal of 9139997798 is 8977999319.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2284999448 + ... + 2284999451.

It is an arithmetic number, because the mean of its divisors is an integer number (3427499175).

Almost surely, 2^9139997798 is an apocalyptic number.

9139997798 is a deficient number, since it is larger than the sum of its proper divisors (4569998902).

9139997798 is a wasteful number, since it uses less digits than its factorization.

9139997798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569998901.

The product of its digits is 69441624, while the sum is 71.

The square root of 9139997798 is about 95603.3357054031. The cubic root of 9139997798 is about 2090.8138278840.

The spelling of 9139997798 in words is "nine billion, one hundred thirty-nine million, nine hundred ninety-seven thousand, seven hundred ninety-eight".