805397 has 2 divisors, whose sum is σ = 805398. Its totient is φ = 805396.

The previous prime is 805381. The next prime is 805403. The reversal of 805397 is 793508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481636 + 323761 = 694^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 805397 - 2⁴ = 805381 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805397.

It is not a weakly prime, because it can be changed into another prime (805327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402698 + 402699.

It is an arithmetic number, because the mean of its divisors is an integer number (402699).

2⁸⁰⁵³⁹⁷ is an apocalyptic number.

It is an amenable number.

805397 is a deficient number, since it is larger than the sum of its proper divisors (1).

805397 is an equidigital number, since it uses as much as digits as its factorization.

805397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 805397 is about 897.4391344264. The cubic root of 805397 is about 93.0400644428.

The spelling of 805397 in words is "eight hundred five thousand, three hundred ninety-seven".