921317 has 4 divisors (see below), whose sum is σ = 935136. Its totient is φ = 907500.

The previous prime is 921293. The next prime is 921331. The reversal of 921317 is 713129.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 921317 - 2¹⁴ = 904933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 921292 and 921301.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921317.

It is not an unprimeable number, because it can be changed into a prime (921517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6809 + ... + 6942.

It is an arithmetic number, because the mean of its divisors is an integer number (233784).

2⁹²¹³¹⁷ is an apocalyptic number.

It is an amenable number.

921317 is a deficient number, since it is larger than the sum of its proper divisors (13819).

921317 is a wasteful number, since it uses less digits than its factorization.

921317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13818.

The product of its digits is 378, while the sum is 23.

The square root of 921317 is about 959.8525928495. The cubic root of 921317 is about 97.3052698957.

The spelling of 921317 in words is "nine hundred twenty-one thousand, three hundred seventeen".