144636869 has 8 divisors (see below), whose sum is σ = 157957632. Its totient is φ = 131629680.

The previous prime is 144636829. The next prime is 144636883. The reversal of 144636869 is 968636441.

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

It is not a de Polignac number, because 144636869 - 2²⁰ = 143588293 is a prime.

It is a super-3 number, since 3×144636869³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144636829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77429 + ... + 79274.

It is an arithmetic number, because the mean of its divisors is an integer number (19744704).

Almost surely, 2^144636869 is an apocalyptic number.

It is an amenable number.

144636869 is a deficient number, since it is larger than the sum of its proper divisors (13320763).

144636869 is a wasteful number, since it uses less digits than its factorization.

144636869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156787.

The product of its digits is 746496, while the sum is 47.

The square root of 144636869 is about 12026.5069326052. The cubic root of 144636869 is about 524.9198595738.

The spelling of 144636869 in words is "one hundred forty-four million, six hundred thirty-six thousand, eight hundred sixty-nine".