143240917 has 2 divisors, whose sum is σ = 143240918. Its totient is φ = 143240916.

The previous prime is 143240879. The next prime is 143240939. The reversal of 143240917 is 719042341.

143240917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131469156 + 11771761 = 11466^2 + 3431^2 .

It is an emirp because it is prime and its reverse (719042341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143240917 - 2⁷ = 143240789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143240117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71620458 + 71620459.

It is an arithmetic number, because the mean of its divisors is an integer number (71620459).

Almost surely, 2^143240917 is an apocalyptic number.

It is an amenable number.

143240917 is a deficient number, since it is larger than the sum of its proper divisors (1).

143240917 is an equidigital number, since it uses as much as digits as its factorization.

143240917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 143240917 is about 11968.3297498022. The cubic root of 143240917 is about 523.2256556517.

The spelling of 143240917 in words is "one hundred forty-three million, two hundred forty thousand, nine hundred seventeen".