213856793 has 2 divisors, whose sum is σ = 213856794. Its totient is φ = 213856792.

The previous prime is 213856739. The next prime is 213856807. The reversal of 213856793 is 397658312.

Together with previous prime (213856739) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193543744 + 20313049 = 13912^2 + 4507^2 .

It is a cyclic number.

It is not a de Polignac number, because 213856793 - 2¹⁰ = 213855769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213856393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106928396 + 106928397.

It is an arithmetic number, because the mean of its divisors is an integer number (106928397).

Almost surely, 2^213856793 is an apocalyptic number.

It is an amenable number.

213856793 is a deficient number, since it is larger than the sum of its proper divisors (1).

213856793 is an equidigital number, since it uses as much as digits as its factorization.

213856793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 213856793 is about 14623.8433046857. The cubic root of 213856793 is about 598.0089492440.

The spelling of 213856793 in words is "two hundred thirteen million, eight hundred fifty-six thousand, seven hundred ninety-three".