143381449 has 2 divisors, whose sum is σ = 143381450. Its totient is φ = 143381448.

The previous prime is 143381431. The next prime is 143381473. The reversal of 143381449 is 944183341.

143381449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90383049 + 52998400 = 9507^2 + 7280^2 .

It is an emirp because it is prime and its reverse (944183341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143381449 - 2¹⁷ = 143250377 is a prime.

It is not a weakly prime, because it can be changed into another prime (143381489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71690724 + 71690725.

It is an arithmetic number, because the mean of its divisors is an integer number (71690725).

Almost surely, 2^143381449 is an apocalyptic number.

It is an amenable number.

143381449 is a deficient number, since it is larger than the sum of its proper divisors (1).

143381449 is an equidigital number, since it uses as much as digits as its factorization.

143381449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 143381449 is about 11974.1993051728. The cubic root of 143381449 is about 523.3967099287.

The spelling of 143381449 in words is "one hundred forty-three million, three hundred eighty-one thousand, four hundred forty-nine".