7873213 has 2 divisors, whose sum is σ = 7873214. Its totient is φ = 7873212.

The previous prime is 7873183. The next prime is 7873223. The reversal of 7873213 is 3123787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5673924 + 2199289 = 2382^2 + 1483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7873213 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7873223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936606 + 3936607.

It is an arithmetic number, because the mean of its divisors is an integer number (3936607).

Almost surely, 2^7873213 is an apocalyptic number.

It is an amenable number.

7873213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7873213 is an equidigital number, since it uses as much as digits as its factorization.

7873213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

The square root of 7873213 is about 2805.9246247895. The cubic root of 7873213 is about 198.9378104199.

The spelling of 7873213 in words is "seven million, eight hundred seventy-three thousand, two hundred thirteen".