144907789 has 4 divisors (see below), whose sum is σ = 156054556. Its totient is φ = 133761024.

The previous prime is 144907787. The next prime is 144907823. The reversal of 144907789 is 987709441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987709441 = 43 ⋅22969987.

It can be written as a sum of positive squares in 2 ways, for example, as 23687689 + 121220100 = 4867^2 + 11010^2 .

It is a cyclic number.

It is not a de Polignac number, because 144907789 - 2¹ = 144907787 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 (144907781) 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, 5573364 + ... + 5573389.

It is an arithmetic number, because the mean of its divisors is an integer number (39013639).

Almost surely, 2^144907789 is an apocalyptic number.

It is an amenable number.

144907789 is a deficient number, since it is larger than the sum of its proper divisors (11146767).

144907789 is a wasteful number, since it uses less digits than its factorization.

144907789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11146766.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 144907789 is about 12037.7651164990. The cubic root of 144907789 is about 525.2473984404.

The spelling of 144907789 in words is "one hundred forty-four million, nine hundred seven thousand, seven hundred eighty-nine".