144442969 has 4 divisors (see below), whose sum is σ = 157574160. Its totient is φ = 131311780.

The previous prime is 144442957. The next prime is 144442973. The reversal of 144442969 is 969244441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 969244441 = 11 ⋅88113131.

It is a cyclic number.

It is not a de Polignac number, because 144442969 - 2⁹ = 144442457 is a prime.

It is a super-2 number, since 2×144442969² = 41727542587069922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144442979) 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, 6565579 + ... + 6565600.

It is an arithmetic number, because the mean of its divisors is an integer number (39393540).

Almost surely, 2^144442969 is an apocalyptic number.

It is an amenable number.

144442969 is a deficient number, since it is larger than the sum of its proper divisors (13131191).

144442969 is a wasteful number, since it uses less digits than its factorization.

144442969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13131190.

The product of its digits is 248832, while the sum is 43.

The square root of 144442969 is about 12018.4428691907. The cubic root of 144442969 is about 524.6851857125.

The spelling of 144442969 in words is "one hundred forty-four million, four hundred forty-two thousand, nine hundred sixty-nine".