143248909 has 2 divisors, whose sum is σ = 143248910. Its totient is φ = 143248908.

The previous prime is 143248891. The next prime is 143248939. The reversal of 143248909 is 909842341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95942025 + 47306884 = 9795^2 + 6878^2 .

It is a cyclic number.

It is not a de Polignac number, because 143248909 - 2⁹ = 143248397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143248939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71624454 + 71624455.

It is an arithmetic number, because the mean of its divisors is an integer number (71624455).

Almost surely, 2^143248909 is an apocalyptic number.

It is an amenable number.

143248909 is a deficient number, since it is larger than the sum of its proper divisors (1).

143248909 is an equidigital number, since it uses as much as digits as its factorization.

143248909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 143248909 is about 11968.6636263202. The cubic root of 143248909 is about 523.2353864413.

The spelling of 143248909 in words is "one hundred forty-three million, two hundred forty-eight thousand, nine hundred nine".