144315989 has 2 divisors, whose sum is σ = 144315990. Its totient is φ = 144315988.

The previous prime is 144315973. The next prime is 144316031. The reversal of 144315989 is 989513441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77616100 + 66699889 = 8810^2 + 8167^2 .

It is a cyclic number.

It is not a de Polignac number, because 144315989 - 2⁴ = 144315973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144315289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72157994 + 72157995.

It is an arithmetic number, because the mean of its divisors is an integer number (72157995).

Almost surely, 2^144315989 is an apocalyptic number.

It is an amenable number.

144315989 is a deficient number, since it is larger than the sum of its proper divisors (1).

144315989 is an equidigital number, since it uses as much as digits as its factorization.

144315989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 144315989 is about 12013.1589933706. The cubic root of 144315989 is about 524.5313901624.

The spelling of 144315989 in words is "one hundred forty-four million, three hundred fifteen thousand, nine hundred eighty-nine".