709678 has 4 divisors (see below), whose sum is σ = 1064520. Its totient is φ = 354838.

The previous prime is 709673. The next prime is 709679. The reversal of 709678 is 876907.

709678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 876907 = 19 ⋅46153.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709673) by changing a digit.

709678 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177418 + ... + 177421.

It is an arithmetic number, because the mean of its divisors is an integer number (266130).

2⁷⁰⁹⁶⁷⁸ is an apocalyptic number.

709678 is a deficient number, since it is larger than the sum of its proper divisors (354842).

709678 is a wasteful number, since it uses less digits than its factorization.

709678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354841.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 709678 is about 842.4238838020. The cubic root of 709678 is about 89.1977256152.

The spelling of 709678 in words is "seven hundred nine thousand, six hundred seventy-eight".