144309893 has 16 divisors (see below), whose sum is σ = 180270720. Its totient is φ = 112470336.

The previous prime is 144309839. The next prime is 144309899. The reversal of 144309893 is 398903441.

It is a cyclic number.

It is not a de Polignac number, because 144309893 - 2²⁰ = 143261317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144309893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144309899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5738 + ... + 17931.

It is an arithmetic number, because the mean of its divisors is an integer number (11266920).

Almost surely, 2^144309893 is an apocalyptic number.

144309893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

144309893 is a deficient number, since it is larger than the sum of its proper divisors (35960827).

144309893 is a wasteful number, since it uses less digits than its factorization.

144309893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23756.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 144309893 is about 12012.9052689181. The cubic root of 144309893 is about 524.5240045442.

The spelling of 144309893 in words is "one hundred forty-four million, three hundred nine thousand, eight hundred ninety-three".