144399593 has 4 divisors (see below), whose sum is σ = 155507268. Its totient is φ = 133291920.

The previous prime is 144399583. The next prime is 144399617. The reversal of 144399593 is 395993441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 395993441 = 229 ⋅1729229.

It can be written as a sum of positive squares in 2 ways, for example, as 95511529 + 48888064 = 9773^2 + 6992^2 .

It is a cyclic number.

It is not a de Polignac number, because 144399593 - 2²⁶ = 77290729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144399503) 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, 5553818 + ... + 5553843.

It is an arithmetic number, because the mean of its divisors is an integer number (38876817).

Almost surely, 2^144399593 is an apocalyptic number.

144399593 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

144399593 is a deficient number, since it is larger than the sum of its proper divisors (11107675).

144399593 is a wasteful number, since it uses less digits than its factorization.

144399593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11107674.

The product of its digits is 524880, while the sum is 47.

The square root of 144399593 is about 12016.6381737989. The cubic root of 144399593 is about 524.6326597380.

The spelling of 144399593 in words is "one hundred forty-four million, three hundred ninety-nine thousand, five hundred ninety-three".