143398181 has 2 divisors, whose sum is σ = 143398182. Its totient is φ = 143398180.

The previous prime is 143398139. The next prime is 143398217. The reversal of 143398181 is 181893341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110965156 + 32433025 = 10534^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 143398181 - 2⁶ = 143398117 is a prime.

It is a super-2 number, since 2×143398181² = 41126076628217522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143398121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71699090 + 71699091.

It is an arithmetic number, because the mean of its divisors is an integer number (71699091).

Almost surely, 2^143398181 is an apocalyptic number.

It is an amenable number.

143398181 is a deficient number, since it is larger than the sum of its proper divisors (1).

143398181 is an equidigital number, since it uses as much as digits as its factorization.

143398181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 143398181 is about 11974.8979536362. The cubic root of 143398181 is about 523.4170685204.

The spelling of 143398181 in words is "one hundred forty-three million, three hundred ninety-eight thousand, one hundred eighty-one".