144651889 has 4 divisors (see below), whose sum is σ = 144700020. Its totient is φ = 144603760.

The previous prime is 144651851. The next prime is 144651901. The reversal of 144651889 is 988156441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66912400 + 77739489 = 8180^2 + 8817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144651889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144651989) 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, 19234 + ... + 25675.

It is an arithmetic number, because the mean of its divisors is an integer number (36175005).

Almost surely, 2^144651889 is an apocalyptic number.

It is an amenable number.

144651889 is a deficient number, since it is larger than the sum of its proper divisors (48131).

144651889 is an equidigital number, since it uses as much as digits as its factorization.

144651889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48130.

The product of its digits is 276480, while the sum is 46.

The square root of 144651889 is about 12027.1313703643. The cubic root of 144651889 is about 524.9380292688.

It can be divided in two parts, 1446 and 51889, that added together give a palindrome (53335).

The spelling of 144651889 in words is "one hundred forty-four million, six hundred fifty-one thousand, eight hundred eighty-nine".