993391 has 8 divisors (see below), whose sum is σ = 1142784. Its totient is φ = 845880.

The previous prime is 993367. The next prime is 993397. The reversal of 993391 is 193399.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 993391 - 2¹¹ = 991343 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 (993397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966 + ... + 1708.

It is an arithmetic number, because the mean of its divisors is an integer number (142848).

2⁹⁹³³⁹¹ is an apocalyptic number.

993391 is a deficient number, since it is larger than the sum of its proper divisors (149393).

993391 is a wasteful number, since it uses less digits than its factorization.

993391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941.

The product of its digits is 6561, while the sum is 34.

The square root of 993391 is about 996.6900220229. The cubic root of 993391 is about 99.7792128893.

The spelling of 993391 in words is "nine hundred ninety-three thousand, three hundred ninety-one".