921993697 has 8 divisors (see below), whose sum is σ = 929797632. Its totient is φ = 914205600.

The previous prime is 921993643. The next prime is 921993701. The reversal of 921993697 is 796399129.

921993697 is digitally balanced in base 2, because in such base 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 921993697 - 2¹¹ = 921991649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921993637) 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, 132372 + ... + 139162.

It is an arithmetic number, because the mean of its divisors is an integer number (116224704).

Almost surely, 2^921993697 is an apocalyptic number.

It is an amenable number.

921993697 is a deficient number, since it is larger than the sum of its proper divisors (7803935).

921993697 is a wasteful number, since it uses less digits than its factorization.

921993697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919.

The product of its digits is 1653372, while the sum is 55.

The square root of 921993697 is about 30364.3491120755. The cubic root of 921993697 is about 973.2908727516.

The spelling of 921993697 in words is "nine hundred twenty-one million, nine hundred ninety-three thousand, six hundred ninety-seven".