7894321 has 2 divisors, whose sum is σ = 7894322. Its totient is φ = 7894320.

The previous prime is 7894303. The next prime is 7894333. The reversal of 7894321 is 1234987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 2062096 = 2415^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 7894321 - 2¹³ = 7886129 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (7894301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3947160 + 3947161.

It is an arithmetic number, because the mean of its divisors is an integer number (3947161).

Almost surely, 2^7894321 is an apocalyptic number.

It is an amenable number.

7894321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7894321 is an equidigital number, since it uses as much as digits as its factorization.

7894321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 7894321 is about 2809.6834341256. The cubic root of 7894321 is about 199.1154351597.

The spelling of 7894321 in words is "seven million, eight hundred ninety-four thousand, three hundred twenty-one".