144397889 has 2 divisors, whose sum is σ = 144397890. Its totient is φ = 144397888.

The previous prime is 144397879. The next prime is 144397901. The reversal of 144397889 is 988793441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103693489 + 40704400 = 10183^2 + 6380^2 .

It is an emirp because it is prime and its reverse (988793441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144397889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144397889.

It is not a weakly prime, because it can be changed into another prime (144397829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72198944 + 72198945.

It is an arithmetic number, because the mean of its divisors is an integer number (72198945).

Almost surely, 2^144397889 is an apocalyptic number.

It is an amenable number.

144397889 is a deficient number, since it is larger than the sum of its proper divisors (1).

144397889 is an equidigital number, since it uses as much as digits as its factorization.

144397889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 144397889 is about 12016.5672718959. The cubic root of 144397889 is about 524.6305960720.

The spelling of 144397889 in words is "one hundred forty-four million, three hundred ninety-seven thousand, eight hundred eighty-nine".