213007843 has 2 divisors, whose sum is σ = 213007844. Its totient is φ = 213007842.

The previous prime is 213007831. The next prime is 213007849. The reversal of 213007843 is 348700312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213007843 is a prime.

It is equal to p_11758420 and since 213007843 and 11758420 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (213007849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106503921 + 106503922.

It is an arithmetic number, because the mean of its divisors is an integer number (106503922).

Almost surely, 2^213007843 is an apocalyptic number.

213007843 is a deficient number, since it is larger than the sum of its proper divisors (1).

213007843 is an equidigital number, since it uses as much as digits as its factorization.

213007843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 213007843 is about 14594.7882136056. The cubic root of 213007843 is about 597.2165919588.

The spelling of 213007843 in words is "two hundred thirteen million, seven thousand, eight hundred forty-three".