143640587 has 2 divisors, whose sum is σ = 143640588. Its totient is φ = 143640586.

The previous prime is 143640557. The next prime is 143640593. The reversal of 143640587 is 785046341.

It is a strong prime.

It is an emirp because it is prime and its reverse (785046341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143640587 - 2¹² = 143636491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143640587.

It is not a weakly prime, because it can be changed into another prime (143640517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71820293 + 71820294.

It is an arithmetic number, because the mean of its divisors is an integer number (71820294).

Almost surely, 2^143640587 is an apocalyptic number.

143640587 is a deficient number, since it is larger than the sum of its proper divisors (1).

143640587 is an equidigital number, since it uses as much as digits as its factorization.

143640587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 143640587 is about 11985.0151022016. The cubic root of 143640587 is about 523.7118375104.

The spelling of 143640587 in words is "one hundred forty-three million, six hundred forty thousand, five hundred eighty-seven".