923391 has 12 divisors (see below), whose sum is σ = 1524432. Its totient is φ = 527616.

The previous prime is 923387. The next prime is 923399. The reversal of 923391 is 193329.

It is not a de Polignac number, because 923391 - 2² = 923387 is a prime.

923391 is a lucky number.

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 923391.

It is not an unprimeable number, because it can be changed into a prime (923399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7266 + ... + 7391.

It is an arithmetic number, because the mean of its divisors is an integer number (127036).

2⁹²³³⁹¹ is an apocalyptic number.

923391 is a deficient number, since it is larger than the sum of its proper divisors (601041).

923391 is a wasteful number, since it uses less digits than its factorization.

923391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14670 (or 14667 counting only the distinct ones).

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

The square root of 923391 is about 960.9323597423. The cubic root of 923391 is about 97.3782306265.

The spelling of 923391 in words is "nine hundred twenty-three thousand, three hundred ninety-one".