538968065 has 4 divisors (see below), whose sum is σ = 646761684. Its totient is φ = 431174448.

The previous prime is 538968043. The next prime is 538968071. The reversal of 538968065 is 560869835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154455184 + 384512881 = 12428^2 + 19609^2 .

It is a cyclic number.

It is not a de Polignac number, because 538968065 - 2²⁸ = 270532609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53896802 + ... + 53896811.

It is an arithmetic number, because the mean of its divisors is an integer number (161690421).

It is a Proth number, since it is equal to 257 ⋅ 2²¹ + 1 and 257 < 2²¹.

Almost surely, 2^538968065 is an apocalyptic number.

It is an amenable number.

538968065 is a deficient number, since it is larger than the sum of its proper divisors (107793619).

538968065 is a wasteful number, since it uses less digits than its factorization.

538968065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107793618.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The square root of 538968065 is about 23215.6857533867. The cubic root of 538968065 is about 813.8062315093.

The spelling of 538968065 in words is "five hundred thirty-eight million, nine hundred sixty-eight thousand, sixty-five".