538782065 has 4 divisors (see below), whose sum is σ = 646538484. Its totient is φ = 431025648.

The previous prime is 538782029. The next prime is 538782089. The reversal of 538782065 is 560287835.

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 227647744 + 311134321 = 15088^2 + 17639^2 .

It is a cyclic number.

It is not a de Polignac number, because 538782065 - 2⁶ = 538782001 is a prime.

It is a super-2 number, since 2×538782065² = 580572227131328450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53878202 + ... + 53878211.

It is an arithmetic number, because the mean of its divisors is an integer number (161634621).

Almost surely, 2^538782065 is an apocalyptic number.

It is an amenable number.

538782065 is a deficient number, since it is larger than the sum of its proper divisors (107756419).

538782065 is a wasteful number, since it uses less digits than its factorization.

538782065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107756418.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 538782065 is about 23211.6794954609. The cubic root of 538782065 is about 813.7126048272.

The spelling of 538782065 in words is "five hundred thirty-eight million, seven hundred eighty-two thousand, sixty-five".