144691 has 4 divisors (see below), whose sum is σ = 145512. Its totient is φ = 143872.

The previous prime is 144671. The next prime is 144701. The reversal of 144691 is 196441.

144691 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 144691 - 2⁵ = 144659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25 + ... + 538.

It is an arithmetic number, because the mean of its divisors is an integer number (36378).

2¹⁴⁴⁶⁹¹ is an apocalyptic number.

144691 is a deficient number, since it is larger than the sum of its proper divisors (821).

144691 is an equidigital number, since it uses as much as digits as its factorization.

144691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820.

The product of its digits is 864, while the sum is 25.

The square root of 144691 is about 380.3827020252. The cubic root of 144691 is about 52.4985335947.

The spelling of 144691 in words is "one hundred forty-four thousand, six hundred ninety-one".