706989 has 4 divisors (see below), whose sum is σ = 942656. Its totient is φ = 471324.

The previous prime is 706987. The next prime is 706999. The reversal of 706989 is 989607.

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.

It is not a de Polignac number, because 706989 - 2¹ = 706987 is a prime.

It is a super-2 number, since 2×706989² = 999666892242, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

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 706989.

It is not an unprimeable number, because it can be changed into a prime (706987) 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, 117829 + ... + 117834.

It is an arithmetic number, because the mean of its divisors is an integer number (235664).

2⁷⁰⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

706989 is a deficient number, since it is larger than the sum of its proper divisors (235667).

706989 is a wasteful number, since it uses less digits than its factorization.

706989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235666.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 706989 is about 840.8263792246. The cubic root of 706989 is about 89.0849250395.

It can be divided in two parts, 70698 and 9, that added together give a palindrome (70707).

The spelling of 706989 in words is "seven hundred six thousand, nine hundred eighty-nine".