1993393 has 4 divisors (see below), whose sum is σ = 2057728. Its totient is φ = 1929060.

The previous prime is 1993367. The next prime is 1993417. The reversal of 1993393 is 3933991.

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 a de Polignac number, because none of the positive numbers 2^k-1993393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1993363) 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, 32121 + ... + 32182.

It is an arithmetic number, because the mean of its divisors is an integer number (514432).

2^1993393 is an apocalyptic number.

It is an amenable number.

1993393 is a deficient number, since it is larger than the sum of its proper divisors (64335).

1993393 is an equidigital number, since it uses as much as digits as its factorization.

1993393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64334.

The product of its digits is 19683, while the sum is 37.

The square root of 1993393 is about 1411.8757027444. The cubic root of 1993393 is about 125.8532136282.

The spelling of 1993393 in words is "one million, nine hundred ninety-three thousand, three hundred ninety-three".