706669 has 2 divisors, whose sum is σ = 706670. Its totient is φ = 706668.

The previous prime is 706661. The next prime is 706679. The reversal of 706669 is 966607.

706669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 580644 + 126025 = 762^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 706669 - 2³ = 706661 is a prime.

It is a super-2 number, since 2×706669² = 998762151122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (706661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353334 + 353335.

It is an arithmetic number, because the mean of its divisors is an integer number (353335).

2⁷⁰⁶⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

706669 is a deficient number, since it is larger than the sum of its proper divisors (1).

706669 is an equidigital number, since it uses as much as digits as its factorization.

706669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 706669 is about 840.6360687004. The cubic root of 706669 is about 89.0714823607.

The spelling of 706669 in words is "seven hundred six thousand, six hundred sixty-nine".