921393 has 24 divisors (see below), whose sum is σ = 1493856. Its totient is φ = 542400.

The previous prime is 921379. The next prime is 921407. The reversal of 921393 is 393129.

921393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (921379) and next prime (921407).

It is not a de Polignac number, because 921393 - 2¹⁶ = 855857 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921393.

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 23 ways as a sum of consecutive naturals, for example, 3946 + ... + 4172.

It is an arithmetic number, because the mean of its divisors is an integer number (62244).

2⁹²¹³⁹³ is an apocalyptic number.

It is an amenable number.

921393 is a deficient number, since it is larger than the sum of its proper divisors (572463).

921393 is a wasteful number, since it uses less digits than its factorization.

921393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 282 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

The square root of 921393 is about 959.8921814454. The cubic root of 921393 is about 97.3079454125.

It can be divided in two parts, 92 and 1393, that added together give a triangular number (1485 = T₅₄).

The spelling of 921393 in words is "nine hundred twenty-one thousand, three hundred ninety-three".