9121399823 has 8 divisors (see below), whose sum is σ = 9679305600. Its totient is φ = 8576937688.

The previous prime is 9121399817. The next prime is 9121399831. The reversal of 9121399823 is 3289931219.

9121399823 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9121399823 - 2¹⁸ = 9121137679 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 (9121399843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3359513 + ... + 3362226.

It is an arithmetic number, because the mean of its divisors is an integer number (1209913200).

Almost surely, 2^9121399823 is an apocalyptic number.

9121399823 is a deficient number, since it is larger than the sum of its proper divisors (557905777).

9121399823 is a wasteful number, since it uses less digits than its factorization.

9121399823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6721821.

The product of its digits is 209952, while the sum is 47.

The square root of 9121399823 is about 95506.0198259775. The cubic root of 9121399823 is about 2089.3947426640.

The spelling of 9121399823 in words is "nine billion, one hundred twenty-one million, three hundred ninety-nine thousand, eight hundred twenty-three".