144646469 has 4 divisors (see below), whose sum is σ = 157796160. Its totient is φ = 131496780.

The previous prime is 144646459. The next prime is 144646529. The reversal of 144646469 is 964646441.

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.

It is a cyclic number.

It is not a de Polignac number, because 144646469 - 2²⁴ = 127869253 is a prime.

It is a super-2 number, since 2×144646469² = 41845201988335922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144646409) 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, 6574829 + ... + 6574850.

It is an arithmetic number, because the mean of its divisors is an integer number (39449040).

Almost surely, 2^144646469 is an apocalyptic number.

It is an amenable number.

144646469 is a deficient number, since it is larger than the sum of its proper divisors (13149691).

144646469 is a wasteful number, since it uses less digits than its factorization.

144646469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13149690.

The product of its digits is 497664, while the sum is 44.

The square root of 144646469 is about 12026.9060443657. The cubic root of 144646469 is about 524.9314728395.

Multiplying 144646469 by its sum of digits (44), we get a palindrome (6364444636).

The spelling of 144646469 in words is "one hundred forty-four million, six hundred forty-six thousand, four hundred sixty-nine".