239641643 has 2 divisors, whose sum is σ = 239641644. Its totient is φ = 239641642.

The previous prime is 239641621. The next prime is 239641651. The reversal of 239641643 is 346146932.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239641643 - 2¹⁴ = 239625259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 239641597 and 239641606.

It is not a weakly prime, because it can be changed into another prime (239641693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119820821 + 119820822.

It is an arithmetic number, because the mean of its divisors is an integer number (119820822).

Almost surely, 2^239641643 is an apocalyptic number.

239641643 is a deficient number, since it is larger than the sum of its proper divisors (1).

239641643 is an equidigital number, since it uses as much as digits as its factorization.

239641643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 38.

The square root of 239641643 is about 15480.3631417354. The cubic root of 239641643 is about 621.1370419720.

The spelling of 239641643 in words is "two hundred thirty-nine million, six hundred forty-one thousand, six hundred forty-three".