538586681 has 4 divisors (see below), whose sum is σ = 540139152. Its totient is φ = 537034212.

The previous prime is 538586647. The next prime is 538586693. The reversal of 538586681 is 186685835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 538586681 - 2¹⁸ = 538324537 is a prime.

It is a super-2 number, since 2×538586681² = 580151225901191522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538586611) 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, 775715 + ... + 776408.

It is an arithmetic number, because the mean of its divisors is an integer number (135034788).

Almost surely, 2^538586681 is an apocalyptic number.

It is an amenable number.

538586681 is a deficient number, since it is larger than the sum of its proper divisors (1552471).

538586681 is a wasteful number, since it uses less digits than its factorization.

538586681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552470.

The product of its digits is 1382400, while the sum is 50.

The square root of 538586681 is about 23207.4703705509. The cubic root of 538586681 is about 813.6142313190.

The spelling of 538586681 in words is "five hundred thirty-eight million, five hundred eighty-six thousand, six hundred eighty-one".