143983649 has 2 divisors, whose sum is σ = 143983650. Its totient is φ = 143983648.

The previous prime is 143983643. The next prime is 143983661. The reversal of 143983649 is 946389341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74511424 + 69472225 = 8632^2 + 8335^2 .

It is an emirp because it is prime and its reverse (946389341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143983649 - 2⁴ = 143983633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (143983643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71991824 + 71991825.

It is an arithmetic number, because the mean of its divisors is an integer number (71991825).

Almost surely, 2^143983649 is an apocalyptic number.

It is an amenable number.

143983649 is a deficient number, since it is larger than the sum of its proper divisors (1).

143983649 is an equidigital number, since it uses as much as digits as its factorization.

143983649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 47.

The square root of 143983649 is about 11999.3186889923. The cubic root of 143983649 is about 524.1284393212.

The spelling of 143983649 in words is "one hundred forty-three million, nine hundred eighty-three thousand, six hundred forty-nine".