144444691 has 4 divisors (see below), whose sum is σ = 144668592. Its totient is φ = 144220792.

The previous prime is 144444667. The next prime is 144444701. The reversal of 144444691 is 196444441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144444691 - 2⁵ = 144444659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144444691.

It is not an unprimeable number, because it can be changed into a prime (144441691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110980 + ... + 112273.

It is an arithmetic number, because the mean of its divisors is an integer number (36167148).

Almost surely, 2^144444691 is an apocalyptic number.

144444691 is a deficient number, since it is larger than the sum of its proper divisors (223901).

144444691 is an equidigital number, since it uses as much as digits as its factorization.

144444691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223900.

The product of its digits is 55296, while the sum is 37.

The square root of 144444691 is about 12018.5145088734. The cubic root of 144444691 is about 524.6872707437.

The spelling of 144444691 in words is "one hundred forty-four million, four hundred forty-four thousand, six hundred ninety-one".