144828991 has 4 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 144505984.

The previous prime is 144828973. The next prime is 144829037. The reversal of 144828991 is 199828441.

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 144828991 - 2⁷ = 144828863 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 (144828961) 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, 160831 + ... + 161728.

It is an arithmetic number, because the mean of its divisors is an integer number (36288000).

Almost surely, 2^144828991 is an apocalyptic number.

144828991 is a deficient number, since it is larger than the sum of its proper divisors (323009).

144828991 is an equidigital number, since it uses as much as digits as its factorization.

144828991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323008.

The product of its digits is 165888, while the sum is 46.

The square root of 144828991 is about 12034.4917217139. The cubic root of 144828991 is about 525.1521747833.

The spelling of 144828991 in words is "one hundred forty-four million, eight hundred twenty-eight thousand, nine hundred ninety-one".