239947 has 2 divisors, whose sum is σ = 239948. Its totient is φ = 239946.

The previous prime is 239933. The next prime is 239957. The reversal of 239947 is 749932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239947 is a prime.

239947 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (239957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119973 + 119974.

It is an arithmetic number, because the mean of its divisors is an integer number (119974).

2²³⁹⁹⁴⁷ is an apocalyptic number.

239947 is a deficient number, since it is larger than the sum of its proper divisors (1).

239947 is an equidigital number, since it uses as much as digits as its factorization.

239947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 239947 is about 489.8438526714. The cubic root of 239947 is about 62.1400752456.

The spelling of 239947 in words is "two hundred thirty-nine thousand, nine hundred forty-seven".