921313 has 4 divisors (see below), whose sum is σ = 926640. Its totient is φ = 915988.

The previous prime is 921293. The next prime is 921331. The reversal of 921313 is 313129.

921313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 921313 - 2¹⁷ = 790241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395 + ... + 2752.

It is an arithmetic number, because the mean of its divisors is an integer number (231660).

2⁹²¹³¹³ is an apocalyptic number.

It is an amenable number.

921313 is a deficient number, since it is larger than the sum of its proper divisors (5327).

921313 is a wasteful number, since it uses less digits than its factorization.

921313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326.

The product of its digits is 162, while the sum is 19.

The square root of 921313 is about 959.8505091940. The cubic root of 921313 is about 97.3051290750.

The spelling of 921313 in words is "nine hundred twenty-one thousand, three hundred thirteen".