144685639 has 8 divisors (see below), whose sum is σ = 166658048. Its totient is φ = 123039000.

The previous prime is 144685579. The next prime is 144685643. The reversal of 144685639 is 936586441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144685639 - 2¹³ = 144677447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144685039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80487 + ... + 82264.

It is an arithmetic number, because the mean of its divisors is an integer number (20832256).

Almost surely, 2^144685639 is an apocalyptic number.

144685639 is a deficient number, since it is larger than the sum of its proper divisors (21972409).

144685639 is a wasteful number, since it uses less digits than its factorization.

144685639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162885.

The product of its digits is 622080, while the sum is 46.

The square root of 144685639 is about 12028.5343662476. The cubic root of 144685639 is about 524.9788520582.

The spelling of 144685639 in words is "one hundred forty-four million, six hundred eighty-five thousand, six hundred thirty-nine".