8213789 has 2 divisors, whose sum is σ = 8213790. Its totient is φ = 8213788.

The previous prime is 8213761. The next prime is 8213797. The reversal of 8213789 is 9873128.

8213789 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5098564 + 3115225 = 2258^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213789 - 2¹² = 8209693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8213089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4106894 + 4106895.

It is an arithmetic number, because the mean of its divisors is an integer number (4106895).

Almost surely, 2^8213789 is an apocalyptic number.

It is an amenable number.

8213789 is a deficient number, since it is larger than the sum of its proper divisors (1).

8213789 is an equidigital number, since it uses as much as digits as its factorization.

8213789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 8213789 is about 2865.9708651694. The cubic root of 8213789 is about 201.7659364495.

The spelling of 8213789 in words is "eight million, two hundred thirteen thousand, seven hundred eighty-nine".