144139903 has 4 divisors (see below), whose sum is σ = 144399240. Its totient is φ = 143880568.

The previous prime is 144139883. The next prime is 144139907. The reversal of 144139903 is 309931441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309931441 = 433 ⋅715777.

It is a cyclic number.

It is not a de Polignac number, because 144139903 - 2²¹ = 142042751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144139907) 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 3 ways as a sum of consecutive naturals, for example, 128833 + ... + 129946.

It is an arithmetic number, because the mean of its divisors is an integer number (36099810).

Almost surely, 2^144139903 is an apocalyptic number.

144139903 is a deficient number, since it is larger than the sum of its proper divisors (259337).

144139903 is an equidigital number, since it uses as much as digits as its factorization.

144139903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259336.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 144139903 is about 12005.8278764940. The cubic root of 144139903 is about 524.3179690770.

The spelling of 144139903 in words is "one hundred forty-four million, one hundred thirty-nine thousand, nine hundred three".