143231369 has 2 divisors, whose sum is σ = 143231370. Its totient is φ = 143231368.

The previous prime is 143231279. The next prime is 143231381. The reversal of 143231369 is 963132341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123765625 + 19465744 = 11125^2 + 4412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143231369 is a prime.

It is a super-2 number, since 2×143231369² = 41030450131228322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_8084372 and since 143231369 and 8084372 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (143221369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71615684 + 71615685.

It is an arithmetic number, because the mean of its divisors is an integer number (71615685).

Almost surely, 2^143231369 is an apocalyptic number.

It is an amenable number.

143231369 is a deficient number, since it is larger than the sum of its proper divisors (1).

143231369 is an equidigital number, since it uses as much as digits as its factorization.

143231369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 143231369 is about 11967.9308570864. The cubic root of 143231369 is about 523.2140298545.

The spelling of 143231369 in words is "one hundred forty-three million, two hundred thirty-one thousand, three hundred sixty-nine".