806389 has 2 divisors, whose sum is σ = 806390. Its totient is φ = 806388.

The previous prime is 806383. The next prime is 806447. The reversal of 806389 is 983608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736164 + 70225 = 858^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 806389 - 2³ = 806381 is a prime.

806389 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403194 + 403195.

It is an arithmetic number, because the mean of its divisors is an integer number (403195).

2⁸⁰⁶³⁸⁹ is an apocalyptic number.

It is an amenable number.

806389 is a deficient number, since it is larger than the sum of its proper divisors (1).

806389 is an equidigital number, since it uses as much as digits as its factorization.

806389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 806389 is about 897.9916480681. The cubic root of 806389 is about 93.0782476313.

The spelling of 806389 in words is "eight hundred six thousand, three hundred eighty-nine".