144643399 has 4 divisors (see below), whose sum is σ = 145058200. Its totient is φ = 144228600.

The previous prime is 144643381. The next prime is 144643417. The reversal of 144643399 is 993346441.

144643399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (144643381) and next prime (144643417).

It is a cyclic number.

It is not a de Polignac number, because 144643399 - 2⁹ = 144642887 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 (144643319) 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, 206877 + ... + 207574.

It is an arithmetic number, because the mean of its divisors is an integer number (36264550).

Almost surely, 2^144643399 is an apocalyptic number.

144643399 is a deficient number, since it is larger than the sum of its proper divisors (414801).

144643399 is an equidigital number, since it uses as much as digits as its factorization.

144643399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414800.

The product of its digits is 279936, while the sum is 43.

The square root of 144643399 is about 12026.7784131911. The cubic root of 144643399 is about 524.9277590698.

The spelling of 144643399 in words is "one hundred forty-four million, six hundred forty-three thousand, three hundred ninety-nine".