706909 has 4 divisors (see below), whose sum is σ = 807904. Its totient is φ = 605916.

The previous prime is 706907. The next prime is 706913. The reversal of 706909 is 909607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 909607 = 107 ⋅8501.

It is a cyclic number.

It is not a de Polignac number, because 706909 - 2¹ = 706907 is a prime.

It is a Duffinian number.

706909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (706907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50487 + ... + 50500.

It is an arithmetic number, because the mean of its divisors is an integer number (201976).

2⁷⁰⁶⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

706909 is a deficient number, since it is larger than the sum of its proper divisors (100995).

706909 is a wasteful number, since it uses less digits than its factorization.

706909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100994.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 706909 is about 840.7788056320. The cubic root of 706909 is about 89.0815647501.

The spelling of 706909 in words is "seven hundred six thousand, nine hundred nine".