143239897 has 2 divisors, whose sum is σ = 143239898. Its totient is φ = 143239896.

The previous prime is 143239891. The next prime is 143239907. The reversal of 143239897 is 798932341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142348761 + 891136 = 11931^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 143239897 - 2²³ = 134851289 is a prime.

It is not a weakly prime, because it can be changed into another prime (143239891) 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, 71619948 + 71619949.

It is an arithmetic number, because the mean of its divisors is an integer number (71619949).

Almost surely, 2^143239897 is an apocalyptic number.

It is an amenable number.

143239897 is a deficient number, since it is larger than the sum of its proper divisors (1).

143239897 is an equidigital number, since it uses as much as digits as its factorization.

143239897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 143239897 is about 11968.2871372640. The cubic root of 143239897 is about 523.2244137081.

The spelling of 143239897 in words is "one hundred forty-three million, two hundred thirty-nine thousand, eight hundred ninety-seven".