788321 has 2 divisors, whose sum is σ = 788322. Its totient is φ = 788320.

The previous prime is 788317. The next prime is 788351. The reversal of 788321 is 123887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474721 + 313600 = 689^2 + 560^2 .

It is an emirp because it is prime and its reverse (123887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 788321 - 2² = 788317 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 788321.

It is not a weakly prime, because it can be changed into another prime (788351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394160 + 394161.

It is an arithmetic number, because the mean of its divisors is an integer number (394161).

2⁷⁸⁸³²¹ is an apocalyptic number.

It is an amenable number.

788321 is a deficient number, since it is larger than the sum of its proper divisors (1).

788321 is an equidigital number, since it uses as much as digits as its factorization.

788321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 788321 is about 887.8744280584. The cubic root of 788321 is about 92.3778177420.

The spelling of 788321 in words is "seven hundred eighty-eight thousand, three hundred twenty-one".