538897213 has 4 divisors (see below), whose sum is σ = 540424188. Its totient is φ = 537370240.

The previous prime is 538897201. The next prime is 538897217. The reversal of 538897213 is 312798835.

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 316946809 + 221950404 = 17803^2 + 14898^2 .

It is a cyclic number.

It is not a de Polignac number, because 538897213 - 2⁵ = 538897181 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 (538897217) 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, 762958 + ... + 763663.

It is an arithmetic number, because the mean of its divisors is an integer number (135106047).

Almost surely, 2^538897213 is an apocalyptic number.

It is an amenable number.

538897213 is a deficient number, since it is larger than the sum of its proper divisors (1526975).

538897213 is a wasteful number, since it uses less digits than its factorization.

538897213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526974.

The product of its digits is 362880, while the sum is 46.

The square root of 538897213 is about 23214.1597521857. The cubic root of 538897213 is about 813.7705693308.

The spelling of 538897213 in words is "five hundred thirty-eight million, eight hundred ninety-seven thousand, two hundred thirteen".