921396197 has 8 divisors (see below), whose sum is σ = 944307840. Its totient is φ = 898765920.

The previous prime is 921396193. The next prime is 921396227. The reversal of 921396197 is 791693129.

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 921396197 - 2² = 921396193 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 (921396191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63704 + ... + 76817.

It is an arithmetic number, because the mean of its divisors is an integer number (118038480).

Almost surely, 2^921396197 is an apocalyptic number.

It is an amenable number.

921396197 is a deficient number, since it is larger than the sum of its proper divisors (22911643).

921396197 is a wasteful number, since it uses less digits than its factorization.

921396197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140683.

The product of its digits is 183708, while the sum is 47.

The square root of 921396197 is about 30354.5086766365. The cubic root of 921396197 is about 973.0805795697.

The spelling of 921396197 in words is "nine hundred twenty-one million, three hundred ninety-six thousand, one hundred ninety-seven".