538421917 has 8 divisors (see below), whose sum is σ = 607623840. Its totient is φ = 472595760.

The previous prime is 538421911. The next prime is 538421941. The reversal of 538421917 is 719124835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538421917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 538421917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538421911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843603 + ... + 844240.

It is an arithmetic number, because the mean of its divisors is an integer number (75952980).

Almost surely, 2^538421917 is an apocalyptic number.

It is an amenable number.

538421917 is a deficient number, since it is larger than the sum of its proper divisors (69201923).

538421917 is a wasteful number, since it uses less digits than its factorization.

538421917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687883.

The product of its digits is 60480, while the sum is 40.

The square root of 538421917 is about 23203.9202937779. The cubic root of 538421917 is about 813.5312561223.

The spelling of 538421917 in words is "five hundred thirty-eight million, four hundred twenty-one thousand, nine hundred seventeen".