538008917 has 4 divisors (see below), whose sum is σ = 538164396. Its totient is φ = 537853440.

The previous prime is 538008907. The next prime is 538008931. The reversal of 538008917 is 719800835.

It is a happy number.

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 135163876 + 402845041 = 11626^2 + 20071^2 .

It is a cyclic number.

It is not a de Polignac number, because 538008917 - 2⁶ = 538008853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538008907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72428 + ... + 79509.

It is an arithmetic number, because the mean of its divisors is an integer number (134541099).

Almost surely, 2^538008917 is an apocalyptic number.

It is an amenable number.

538008917 is a deficient number, since it is larger than the sum of its proper divisors (155479).

538008917 is a wasteful number, since it uses less digits than its factorization.

538008917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155478.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 538008917 is about 23195.0192282740. The cubic root of 538008917 is about 813.3231947846.

The spelling of 538008917 in words is "five hundred thirty-eight million, eight thousand, nine hundred seventeen".