144429731 has 8 divisors (see below), whose sum is σ = 147671040. Its totient is φ = 141195528.

The previous prime is 144429709. The next prime is 144429737. The reversal of 144429731 is 137924441.

It is a happy number.

144429731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144429731 is a prime.

It is a super-2 number, since 2×144429731² = 41719894393464722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144429691 and 144429700.

It is not an unprimeable number, because it can be changed into a prime (144429737) 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, 81230 + ... + 82988.

It is an arithmetic number, because the mean of its divisors is an integer number (18458880).

Almost surely, 2^144429731 is an apocalyptic number.

144429731 is a deficient number, since it is larger than the sum of its proper divisors (3241309).

144429731 is a wasteful number, since it uses less digits than its factorization.

144429731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553.

The product of its digits is 24192, while the sum is 35.

The square root of 144429731 is about 12017.8921196689. The cubic root of 144429731 is about 524.6691563303.

The spelling of 144429731 in words is "one hundred forty-four million, four hundred twenty-nine thousand, seven hundred thirty-one".