538389817 has 4 divisors (see below), whose sum is σ = 615302656. Its totient is φ = 461476980.

The previous prime is 538389791. The next prime is 538389829. The reversal of 538389817 is 718983835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 718983835 = 5 ⋅143796767.

It is a cyclic number.

It is not a de Polignac number, because 538389817 - 2¹⁹ = 537865529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538389857) 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 in 3 ways as a sum of consecutive naturals, for example, 38456409 + ... + 38456422.

It is an arithmetic number, because the mean of its divisors is an integer number (153825664).

Almost surely, 2^538389817 is an apocalyptic number.

It is an amenable number.

538389817 is a deficient number, since it is larger than the sum of its proper divisors (76912839).

538389817 is an equidigital number, since it uses as much as digits as its factorization.

538389817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76912838.

The product of its digits is 1451520, while the sum is 52.

The square root of 538389817 is about 23203.2285900045. The cubic root of 538389817 is about 813.5150885831.

The spelling of 538389817 in words is "five hundred thirty-eight million, three hundred eighty-nine thousand, eight hundred seventeen".