144918399 has 4 divisors (see below), whose sum is σ = 193224536. Its totient is φ = 96612264.

The previous prime is 144918349. The next prime is 144918427. The reversal of 144918399 is 993819441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993819441 = 3 ⋅331273147.

It is not a de Polignac number, because 144918399 - 2⁸ = 144918143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144918349) 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, 24153064 + ... + 24153069.

It is an arithmetic number, because the mean of its divisors is an integer number (48306134).

Almost surely, 2^144918399 is an apocalyptic number.

144918399 is a deficient number, since it is larger than the sum of its proper divisors (48306137).

144918399 is an equidigital number, since it uses as much as digits as its factorization.

144918399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48306136.

The product of its digits is 279936, while the sum is 48.

The square root of 144918399 is about 12038.2058048531. The cubic root of 144918399 is about 525.2602174865.

The spelling of 144918399 in words is "one hundred forty-four million, nine hundred eighteen thousand, three hundred ninety-nine".