538389217 has 2 divisors, whose sum is σ = 538389218. Its totient is φ = 538389216.

The previous prime is 538389199. The next prime is 538389223. The reversal of 538389217 is 712983835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504271936 + 34117281 = 22456^2 + 5841^2 .

It is a cyclic number.

It is not a de Polignac number, because 538389217 - 2²³ = 530000609 is a prime.

It is not a weakly prime, because it can be changed into another prime (538389017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269194608 + 269194609.

It is an arithmetic number, because the mean of its divisors is an integer number (269194609).

Almost surely, 2^538389217 is an apocalyptic number.

It is an amenable number.

538389217 is a deficient number, since it is larger than the sum of its proper divisors (1).

538389217 is an equidigital number, since it uses as much as digits as its factorization.

538389217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 538389217 is about 23203.2156607656. The cubic root of 538389217 is about 813.5147863800.

The spelling of 538389217 in words is "five hundred thirty-eight million, three hundred eighty-nine thousand, two hundred seventeen".