662789 has 2 divisors, whose sum is σ = 662790. Its totient is φ = 662788.

The previous prime is 662773. The next prime is 662797. The reversal of 662789 is 987266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550564 + 112225 = 742^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 662789 - 2⁴ = 662773 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331394 + 331395.

It is an arithmetic number, because the mean of its divisors is an integer number (331395).

2⁶⁶²⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

662789 is a deficient number, since it is larger than the sum of its proper divisors (1).

662789 is an equidigital number, since it uses as much as digits as its factorization.

662789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 662789 is about 814.1185417370. The cubic root of 662789 is about 87.1883443305.

The spelling of 662789 in words is "six hundred sixty-two thousand, seven hundred eighty-nine".