146689 has 3 divisors (see below), whose sum is σ = 147073.
Its totient is φ = 146306.
The previous prime is 146683. The next prime is 146701. The reversal of 146689 is 986641.
146689 = T382 + T383.
The square root of 146689 is 383.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is not a de Polignac number, because 146689 - 23 = 146681 is a prime.
It is a Duffinian number.
It is a plaindrome in base 10.
It is not an unprimeable number, because it can be changed into a prime (146681) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 192 + ... + 574.
146689 is a Friedman number, since it can be written as (96*4-1)^(8-6), using all its digits and the basic arithmetic operations.
2146689 is an apocalyptic number.
146689 is the 383-rd square number.
146689 is the 192-nd centered octagonal number.
It is an amenable number.
146689 is a deficient number, since it is larger than the sum of its proper divisors (384).
146689 is an frugal number, since it uses more digits than its factorization.
146689 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 766 (or 383 counting only the distinct ones).
The product of its digits is 10368, while the sum is 34.
The cubic root of 146689 is about 52.7390759257.
The spelling of 146689 in words is "one hundred forty-six thousand, six hundred eighty-nine".