70689 has 4 divisors (see below), whose sum is σ = 94256. Its totient is φ = 47124.

The previous prime is 70687. The next prime is 70709. The reversal of 70689 is 98607.

It is a happy number.

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: 98607 = 3 ⋅32869.

It is not a de Polignac number, because 70689 - 2¹ = 70687 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11779 + ... + 11784.

It is an arithmetic number, because the mean of its divisors is an integer number (23564).

2⁷⁰⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

70689 is a deficient number, since it is larger than the sum of its proper divisors (23567).

70689 is a wasteful number, since it uses less digits than its factorization.

70689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23566.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 70689 is about 265.8740303226. The cubic root of 70689 is about 41.3476291745.

The spelling of 70689 in words is "seventy thousand, six hundred eighty-nine".