538006505 has 4 divisors (see below), whose sum is σ = 645607812. Its totient is φ = 430405200.

The previous prime is 538006499. The next prime is 538006541. The reversal of 538006505 is 505600835.

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 201980944 + 336025561 = 14212^2 + 18331^2 .

It is a de Polignac number, because none of the positive numbers 2^k-538006505 is a prime.

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, 53800646 + ... + 53800655.

It is an arithmetic number, because the mean of its divisors is an integer number (161401953).

Almost surely, 2^538006505 is an apocalyptic number.

It is an amenable number.

538006505 is a deficient number, since it is larger than the sum of its proper divisors (107601307).

538006505 is a wasteful number, since it uses less digits than its factorization.

538006505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107601306.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 538006505 is about 23194.9672342946. The cubic root of 538006505 is about 813.3219793534.

The spelling of 538006505 in words is "five hundred thirty-eight million, six thousand, five hundred five".