9791899405 has 4 divisors (see below), whose sum is σ = 11750279292. Its totient is φ = 7833519520.

The previous prime is 9791899391. The next prime is 9791899421. The reversal of 9791899405 is 5049981979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5049981979 = 7 ⋅721425997.

It can be written as a sum of positive squares in 2 ways, for example, as 6943222276 + 2848677129 = 83326^2 + 53373^2 .

It is not a de Polignac number, because 9791899405 - 2⁷ = 9791899277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979189936 + ... + 979189945.

It is an arithmetic number, because the mean of its divisors is an integer number (2937569823).

Almost surely, 2^9791899405 is an apocalyptic number.

It is an amenable number.

9791899405 is a deficient number, since it is larger than the sum of its proper divisors (1958379887).

9791899405 is a wasteful number, since it uses less digits than its factorization.

9791899405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958379886.

The product of its (nonzero) digits is 7348320, while the sum is 61.

The square root of 9791899405 is about 98954.0267245351. The cubic root of 9791899405 is about 2139.3851703477.

The spelling of 9791899405 in words is "nine billion, seven hundred ninety-one million, eight hundred ninety-nine thousand, four hundred five".