144536399 has 4 divisors (see below), whose sum is σ = 165184464. Its totient is φ = 123888336.

The previous prime is 144536387. The next prime is 144536419. The reversal of 144536399 is 993635441.

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

It is a cyclic number.

It is not a de Polignac number, because 144536399 - 2²⁴ = 127759183 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 (144536309) 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, 10324022 + ... + 10324035.

It is an arithmetic number, because the mean of its divisors is an integer number (41296116).

Almost surely, 2^144536399 is an apocalyptic number.

144536399 is a deficient number, since it is larger than the sum of its proper divisors (20648065).

144536399 is an equidigital number, since it uses as much as digits as its factorization.

144536399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20648064.

The product of its digits is 349920, while the sum is 44.

The square root of 144536399 is about 12022.3291836482. The cubic root of 144536399 is about 524.7982886475.

The spelling of 144536399 in words is "one hundred forty-four million, five hundred thirty-six thousand, three hundred ninety-nine".