767321 has 2 divisors, whose sum is σ = 767322. Its totient is φ = 767320.

The previous prime is 767317. The next prime is 767323. The reversal of 767321 is 123767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 225625 = 736^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 767321 - 2² = 767317 is a prime.

Together with 767323, 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 (767323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383660 + 383661.

It is an arithmetic number, because the mean of its divisors is an integer number (383661).

2⁷⁶⁷³²¹ is an apocalyptic number.

It is an amenable number.

767321 is a deficient number, since it is larger than the sum of its proper divisors (1).

767321 is an equidigital number, since it uses as much as digits as its factorization.

767321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 26.

The square root of 767321 is about 875.9686067434. The cubic root of 767321 is about 91.5501432186.

The spelling of 767321 in words is "seven hundred sixty-seven thousand, three hundred twenty-one".