144451999 has 4 divisors (see below), whose sum is σ = 144480280. Its totient is φ = 144423720.

The previous prime is 144451919. The next prime is 144452027. The reversal of 144451999 is 999154441.

144451999 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, and also an emirpimes, since its reverse is a distinct semiprime: 999154441 = 61 ⋅16379581.

It is a cyclic number.

It is not a de Polignac number, because 144451999 - 2¹⁹ = 143927711 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 (144451919) 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, 4104 + ... + 17485.

It is an arithmetic number, because the mean of its divisors is an integer number (36120070).

Almost surely, 2^144451999 is an apocalyptic number.

144451999 is a deficient number, since it is larger than the sum of its proper divisors (28281).

144451999 is an equidigital number, since it uses as much as digits as its factorization.

144451999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28280.

The product of its digits is 233280, while the sum is 46.

The square root of 144451999 is about 12018.8185359460. The cubic root of 144451999 is about 524.6961192284.

The spelling of 144451999 in words is "one hundred forty-four million, four hundred fifty-one thousand, nine hundred ninety-nine".