144479891 has 4 divisors (see below), whose sum is σ = 144504000. Its totient is φ = 144455784.

The previous prime is 144479887. The next prime is 144479893. The reversal of 144479891 is 198974441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 144479891 - 2² = 144479887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144479893) 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 3 ways as a sum of consecutive naturals, for example, 4670 + ... + 17628.

It is an arithmetic number, because the mean of its divisors is an integer number (36126000).

Almost surely, 2^144479891 is an apocalyptic number.

144479891 is a deficient number, since it is larger than the sum of its proper divisors (24109).

144479891 is a wasteful number, since it uses less digits than its factorization.

144479891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24108.

The product of its digits is 290304, while the sum is 47.

The square root of 144479891 is about 12019.9788269364. The cubic root of 144479891 is about 524.7298879600.

The spelling of 144479891 in words is "one hundred forty-four million, four hundred seventy-nine thousand, eight hundred ninety-one".