144291993 has 8 divisors (see below), whose sum is σ = 195650400. Its totient is φ = 94564128.

The previous prime is 144291991. The next prime is 144292003. The reversal of 144291993 is 399192441.

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

It is not a de Polignac number, because 144291993 - 2¹ = 144291991 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (144291991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407428 + ... + 407781.

It is an arithmetic number, because the mean of its divisors is an integer number (24456300).

Almost surely, 2^144291993 is an apocalyptic number.

It is an amenable number.

144291993 is a deficient number, since it is larger than the sum of its proper divisors (51358407).

144291993 is an equidigital number, since it uses as much as digits as its factorization.

144291993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815271.

The product of its digits is 69984, while the sum is 42.

The square root of 144291993 is about 12012.1602137168. The cubic root of 144291993 is about 524.5023165695.

The spelling of 144291993 in words is "one hundred forty-four million, two hundred ninety-one thousand, nine hundred ninety-three".