143947 has 2 divisors, whose sum is σ = 143948. Its totient is φ = 143946.
The previous prime is 143909. The next prime is 143953. The reversal of 143947 is 749341.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-143947 is a prime.
It is not a weakly prime, because it can be changed into another prime (143977) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71973 + 71974.
It is an arithmetic number, because the mean of its divisors is an integer number (71974).
2143947 is an apocalyptic number.
143947 is a deficient number, since it is larger than the sum of its proper divisors (1).
143947 is an equidigital number, since it uses as much as digits as its factorization.
143947 is an evil number, because the sum of its binary digits is even.
The product of its digits is 3024, while the sum is 28.
The square root of 143947 is about 379.4034791617. The cubic root of 143947 is about 52.4083965722.
The spelling of 143947 in words is "one hundred forty-three thousand, nine hundred forty-seven".
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