1670213 has 2 divisors, whose sum is σ = 1670214. Its totient is φ = 1670212.

The previous prime is 1670183. The next prime is 1670269. The reversal of 1670213 is 3120761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 925444 + 744769 = 962^2 + 863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1670213 is a prime.

It is a super-2 number, since 2×1670213² = 5579222930738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835106 + 835107.

It is an arithmetic number, because the mean of its divisors is an integer number (835107).

2^1670213 is an apocalyptic number.

It is an amenable number.

1670213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670213 is an equidigital number, since it uses as much as digits as its factorization.

1670213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1670213 is about 1292.3672078786. The cubic root of 1670213 is about 118.6471434377.

Adding to 1670213 its reverse (3120761), we get a palindrome (4790974).

The spelling of 1670213 in words is "one million, six hundred seventy thousand, two hundred thirteen".