538242917 has 2 divisors, whose sum is σ = 538242918. Its totient is φ = 538242916.

The previous prime is 538242883. The next prime is 538242983. The reversal of 538242917 is 719242835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471150436 + 67092481 = 21706^2 + 8191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538242917 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 (538242517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269121458 + 269121459.

It is an arithmetic number, because the mean of its divisors is an integer number (269121459).

Almost surely, 2^538242917 is an apocalyptic number.

It is an amenable number.

538242917 is a deficient number, since it is larger than the sum of its proper divisors (1).

538242917 is an equidigital number, since it uses as much as digits as its factorization.

538242917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 538242917 is about 23200.0628662941. The cubic root of 538242917 is about 813.4410924849.

The spelling of 538242917 in words is "five hundred thirty-eight million, two hundred forty-two thousand, nine hundred seventeen".