144401381 has 2 divisors, whose sum is σ = 144401382. Its totient is φ = 144401380.

The previous prime is 144401377. The next prime is 144401443. The reversal of 144401381 is 183104441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142324900 + 2076481 = 11930^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 144401381 - 2² = 144401377 is a prime.

It is a super-2 number, since 2×144401381² = 41703517669414322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144401381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144401371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72200690 + 72200691.

It is an arithmetic number, because the mean of its divisors is an integer number (72200691).

Almost surely, 2^144401381 is an apocalyptic number.

It is an amenable number.

144401381 is a deficient number, since it is larger than the sum of its proper divisors (1).

144401381 is an equidigital number, since it uses as much as digits as its factorization.

144401381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 144401381 is about 12016.7125704163. The cubic root of 144401381 is about 524.6348251165.

The spelling of 144401381 in words is "one hundred forty-four million, four hundred one thousand, three hundred eighty-one".