144661813 has 2 divisors, whose sum is σ = 144661814. Its totient is φ = 144661812.

The previous prime is 144661807. The next prime is 144661849. The reversal of 144661813 is 318166441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117548964 + 27112849 = 10842^2 + 5207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144661813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144661873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72330906 + 72330907.

It is an arithmetic number, because the mean of its divisors is an integer number (72330907).

Almost surely, 2^144661813 is an apocalyptic number.

It is an amenable number.

144661813 is a deficient number, since it is larger than the sum of its proper divisors (1).

144661813 is an equidigital number, since it uses as much as digits as its factorization.

144661813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 144661813 is about 12027.5439304955. The cubic root of 144661813 is about 524.9500336422.

The spelling of 144661813 in words is "one hundred forty-four million, six hundred sixty-one thousand, eight hundred thirteen".