144309639 has 8 divisors (see below), whose sum is σ = 192496752. Its totient is φ = 96164480.

The previous prime is 144309631. The next prime is 144309647. The reversal of 144309639 is 936903441.

It is an interprime number because it is at equal distance from previous prime (144309631) and next prime (144309647).

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

It is a cyclic number.

It is not a de Polignac number, because 144309639 - 2³ = 144309631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144309597 and 144309606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144309631) 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, 1314 + ... + 17039.

It is an arithmetic number, because the mean of its divisors is an integer number (24062094).

Almost surely, 2^144309639 is an apocalyptic number.

144309639 is a deficient number, since it is larger than the sum of its proper divisors (48187113).

144309639 is a wasteful number, since it uses less digits than its factorization.

144309639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20977.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 144309639 is about 12012.8946969496. The cubic root of 144309639 is about 524.5236968056.

The spelling of 144309639 in words is "one hundred forty-four million, three hundred nine thousand, six hundred thirty-nine".