921236838693 has 8 divisors (see below), whose sum is σ = 1229626691328. Its totient is φ = 613502439264.

The previous prime is 921236838673. The next prime is 921236838703. The reversal of 921236838693 is 396838632129.

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

It is not a de Polignac number, because 921236838693 - 2¹² = 921236834597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921236838653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163860021 + ... + 163865642.

It is an arithmetic number, because the mean of its divisors is an integer number (153703336416).

Almost surely, 2^921236838693 is an apocalyptic number.

It is an amenable number.

921236838693 is a deficient number, since it is larger than the sum of its proper divisors (308389852635).

921236838693 is a wasteful number, since it uses less digits than its factorization.

921236838693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327726603.

The product of its digits is 20155392, while the sum is 60.

The spelling of 921236838693 in words is "nine hundred twenty-one billion, two hundred thirty-six million, eight hundred thirty-eight thousand, six hundred ninety-three".