144442919 has 4 divisors (see below), whose sum is σ = 149102400. Its totient is φ = 139783440.

The previous prime is 144442913. The next prime is 144442951. The reversal of 144442919 is 919244441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919244441 = 61 ⋅15069581.

It is a cyclic number.

It is not a de Polignac number, because 144442919 - 2¹² = 144438823 is a prime.

It is a super-2 number, since 2×144442919² = 41727513698481122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144442913) 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, 2329694 + ... + 2329755.

It is an arithmetic number, because the mean of its divisors is an integer number (37275600).

Almost surely, 2^144442919 is an apocalyptic number.

144442919 is a deficient number, since it is larger than the sum of its proper divisors (4659481).

144442919 is an equidigital number, since it uses as much as digits as its factorization.

144442919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659480.

The product of its digits is 41472, while the sum is 38.

The square root of 144442919 is about 12018.4407890541. The cubic root of 144442919 is about 524.6851251713.

The spelling of 144442919 in words is "one hundred forty-four million, four hundred forty-two thousand, nine hundred nineteen".