239928917 has 2 divisors, whose sum is σ = 239928918. Its totient is φ = 239928916.

The previous prime is 239928907. The next prime is 239928967. The reversal of 239928917 is 719829932.

It is an a-pointer prime, because the next prime (239928967) can be obtained adding 239928917 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239599441 + 329476 = 15479^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 239928917 - 2¹⁰ = 239927893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239928907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119964458 + 119964459.

It is an arithmetic number, because the mean of its divisors is an integer number (119964459).

Almost surely, 2^239928917 is an apocalyptic number.

It is an amenable number.

239928917 is a deficient number, since it is larger than the sum of its proper divisors (1).

239928917 is an equidigital number, since it uses as much as digits as its factorization.

239928917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 239928917 is about 15489.6390209714. The cubic root of 239928917 is about 621.3851419636.

The spelling of 239928917 in words is "two hundred thirty-nine million, nine hundred twenty-eight thousand, nine hundred seventeen".