239381887 has 2 divisors, whose sum is σ = 239381888. Its totient is φ = 239381886.

The previous prime is 239381843. The next prime is 239381927. The reversal of 239381887 is 788183932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239381887 - 2¹⁵ = 239349119 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 239381887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239381837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119690943 + 119690944.

It is an arithmetic number, because the mean of its divisors is an integer number (119690944).

Almost surely, 2^239381887 is an apocalyptic number.

239381887 is a deficient number, since it is larger than the sum of its proper divisors (1).

239381887 is an equidigital number, since it uses as much as digits as its factorization.

239381887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 239381887 is about 15471.9710121238. The cubic root of 239381887 is about 620.9125367454.

The spelling of 239381887 in words is "two hundred thirty-nine million, three hundred eighty-one thousand, eight hundred eighty-seven".