144474389 has 4 divisors (see below), whose sum is σ = 144784224. Its totient is φ = 144164556.

The previous prime is 144474329. The next prime is 144474397. The reversal of 144474389 is 983474441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 983474441 = 67 ⋅14678723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144474389 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 (144474329) 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, 154217 + ... + 155150.

It is an arithmetic number, because the mean of its divisors is an integer number (36196056).

Almost surely, 2^144474389 is an apocalyptic number.

It is an amenable number.

144474389 is a deficient number, since it is larger than the sum of its proper divisors (309835).

144474389 is an equidigital number, since it uses as much as digits as its factorization.

144474389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309834.

The product of its digits is 387072, while the sum is 44.

The square root of 144474389 is about 12019.7499558019. The cubic root of 144474389 is about 524.7232270550.

The spelling of 144474389 in words is "one hundred forty-four million, four hundred seventy-four thousand, three hundred eighty-nine".