1768213 has 4 divisors (see below), whose sum is σ = 1786540. Its totient is φ = 1749888.

The previous prime is 1768199. The next prime is 1768223. The reversal of 1768213 is 3128671.

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 1456849 + 311364 = 1207^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 1768213 - 2⁵ = 1768181 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 (1768223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9018 + ... + 9211.

It is an arithmetic number, because the mean of its divisors is an integer number (446635).

2^1768213 is an apocalyptic number.

It is an amenable number.

1768213 is a deficient number, since it is larger than the sum of its proper divisors (18327).

1768213 is an equidigital number, since it uses as much as digits as its factorization.

1768213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18326.

The product of its digits is 2016, while the sum is 28.

The square root of 1768213 is about 1329.7417042418. The cubic root of 1768213 is about 120.9237276302.

The spelling of 1768213 in words is "one million, seven hundred sixty-eight thousand, two hundred thirteen".