144309643 has 4 divisors (see below), whose sum is σ = 145265488. Its totient is φ = 143353800.

The previous prime is 144309631. The next prime is 144309647. The reversal of 144309643 is 346903441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346903441 = 881 ⋅393761.

It is a cyclic number.

It is not a de Polignac number, because 144309643 - 2⁵ = 144309611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144309599 and 144309608.

It is not an unprimeable number, because it can be changed into a prime (144309647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477696 + ... + 477997.

It is an arithmetic number, because the mean of its divisors is an integer number (36316372).

Almost surely, 2^144309643 is an apocalyptic number.

144309643 is a deficient number, since it is larger than the sum of its proper divisors (955845).

144309643 is an equidigital number, since it uses as much as digits as its factorization.

144309643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955844.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 144309643 is about 12012.8948634374. The cubic root of 144309643 is about 524.5237016518.

The spelling of 144309643 in words is "one hundred forty-four million, three hundred nine thousand, six hundred forty-three".