239643071 has 2 divisors, whose sum is σ = 239643072. Its totient is φ = 239643070.

The previous prime is 239643023. The next prime is 239643077. The reversal of 239643071 is 170346932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239643071 is a prime.

It is a super-2 number, since 2×239643071² = 114857602956622082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239643077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119821535 + 119821536.

It is an arithmetic number, because the mean of its divisors is an integer number (119821536).

Almost surely, 2^239643071 is an apocalyptic number.

239643071 is a deficient number, since it is larger than the sum of its proper divisors (1).

239643071 is an equidigital number, since it uses as much as digits as its factorization.

239643071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 239643071 is about 15480.4092646157. The cubic root of 239643071 is about 621.1382757335.

The spelling of 239643071 in words is "two hundred thirty-nine million, six hundred forty-three thousand, seventy-one".