143244749 has 2 divisors, whose sum is σ = 143244750. Its totient is φ = 143244748.

The previous prime is 143244679. The next prime is 143244779. The reversal of 143244749 is 947442341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82482724 + 60762025 = 9082^2 + 7795^2 .

It is an emirp because it is prime and its reverse (947442341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143244749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143244779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71622374 + 71622375.

It is an arithmetic number, because the mean of its divisors is an integer number (71622375).

Almost surely, 2^143244749 is an apocalyptic number.

It is an amenable number.

143244749 is a deficient number, since it is larger than the sum of its proper divisors (1).

143244749 is an equidigital number, since it uses as much as digits as its factorization.

143244749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The square root of 143244749 is about 11968.4898379035. The cubic root of 143244749 is about 523.2303214108.

The spelling of 143244749 in words is "one hundred forty-three million, two hundred forty-four thousand, seven hundred forty-nine".