1993213 has 4 divisors (see below), whose sum is σ = 2007900. Its totient is φ = 1978528.

The previous prime is 1993193. The next prime is 1993217. The reversal of 1993213 is 3123991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1435204 + 558009 = 1198^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1993213 - 2¹⁷ = 1862141 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 (1993217) 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, 7138 + ... + 7411.

It is an arithmetic number, because the mean of its divisors is an integer number (501975).

2^1993213 is an apocalyptic number.

It is an amenable number.

1993213 is a deficient number, since it is larger than the sum of its proper divisors (14687).

1993213 is a wasteful number, since it uses less digits than its factorization.

1993213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14686.

The product of its digits is 1458, while the sum is 28.

The square root of 1993213 is about 1411.8119563171. The cubic root of 1993213 is about 125.8494254038.

The spelling of 1993213 in words is "one million, nine hundred ninety-three thousand, two hundred thirteen".