70328213 has 2 divisors, whose sum is σ = 70328214. Its totient is φ = 70328212.

The previous prime is 70328197. The next prime is 70328233. The reversal of 70328213 is 31282307.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66552964 + 3775249 = 8158^2 + 1943^2 .

It is a cyclic number.

It is not a de Polignac number, because 70328213 - 2⁴ = 70328197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4136255 and since 70328213 and 4136255 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70328233) 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 as a sum of consecutive naturals, namely, 35164106 + 35164107.

It is an arithmetic number, because the mean of its divisors is an integer number (35164107).

Almost surely, 2^70328213 is an apocalyptic number.

It is an amenable number.

70328213 is a deficient number, since it is larger than the sum of its proper divisors (1).

70328213 is an equidigital number, since it uses as much as digits as its factorization.

70328213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 70328213 is about 8386.1918055814. The cubic root of 70328213 is about 412.7716494117.

The spelling of 70328213 in words is "seventy million, three hundred twenty-eight thousand, two hundred thirteen".