7864243 has 2 divisors, whose sum is σ = 7864244. Its totient is φ = 7864242.

The previous prime is 7864201. The next prime is 7864247. The reversal of 7864243 is 3424687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7864243 - 2⁹ = 7863731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7864199 and 7864208.

It is not a weakly prime, because it can be changed into another prime (7864247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3932121 + 3932122.

It is an arithmetic number, because the mean of its divisors is an integer number (3932122).

Almost surely, 2^7864243 is an apocalyptic number.

7864243 is a deficient number, since it is larger than the sum of its proper divisors (1).

7864243 is an equidigital number, since it uses as much as digits as its factorization.

7864243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 34.

The square root of 7864243 is about 2804.3257656699. The cubic root of 7864243 is about 198.8622313530.

The spelling of 7864243 in words is "seven million, eight hundred sixty-four thousand, two hundred forty-three".