143938909 has 2 divisors, whose sum is σ = 143938910. Its totient is φ = 143938908.

The previous prime is 143938901. The next prime is 143938933. The reversal of 143938909 is 909839341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81054009 + 62884900 = 9003^2 + 7930^2 .

It is an emirp because it is prime and its reverse (909839341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143938909 - 2³ = 143938901 is a prime.

It is a super-2 number, since 2×143938909² = 41436819048220562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143938901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71969454 + 71969455.

It is an arithmetic number, because the mean of its divisors is an integer number (71969455).

Almost surely, 2^143938909 is an apocalyptic number.

It is an amenable number.

143938909 is a deficient number, since it is larger than the sum of its proper divisors (1).

143938909 is an equidigital number, since it uses as much as digits as its factorization.

143938909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 143938909 is about 11997.4542716361. The cubic root of 143938909 is about 524.0741462683.

The spelling of 143938909 in words is "one hundred forty-three million, nine hundred thirty-eight thousand, nine hundred nine".