213343393 has 2 divisors, whose sum is σ = 213343394. Its totient is φ = 213343392.

The previous prime is 213343337. The next prime is 213343397. The reversal of 213343393 is 393343312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195804049 + 17539344 = 13993^2 + 4188^2 .

It is a cyclic number.

It is not a de Polignac number, because 213343393 - 2¹³ = 213335201 is a prime.

It is not a weakly prime, because it can be changed into another prime (213343397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106671696 + 106671697.

It is an arithmetic number, because the mean of its divisors is an integer number (106671697).

Almost surely, 2^213343393 is an apocalyptic number.

It is an amenable number.

213343393 is a deficient number, since it is larger than the sum of its proper divisors (1).

213343393 is an equidigital number, since it uses as much as digits as its factorization.

213343393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 31.

The square root of 213343393 is about 14606.2792318920. The cubic root of 213343393 is about 597.5300246929.

The spelling of 213343393 in words is "two hundred thirteen million, three hundred forty-three thousand, three hundred ninety-three".