7646321 has 2 divisors, whose sum is σ = 7646322. Its totient is φ = 7646320.

The previous prime is 7646299. The next prime is 7646323. The reversal of 7646321 is 1236467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6071296 + 1575025 = 2464^2 + 1255^2 .

It is an emirp because it is prime and its reverse (1236467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7646321 - 2²² = 3452017 is a prime.

Together with 7646323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7646323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3823160 + 3823161.

It is an arithmetic number, because the mean of its divisors is an integer number (3823161).

Almost surely, 2^7646321 is an apocalyptic number.

It is an amenable number.

7646321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7646321 is an equidigital number, since it uses as much as digits as its factorization.

7646321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 7646321 is about 2765.1981845792. The cubic root of 7646321 is about 197.0081421047.

The spelling of 7646321 in words is "seven million, six hundred forty-six thousand, three hundred twenty-one".