538679689 has 4 divisors (see below), whose sum is σ = 551818260. Its totient is φ = 525541120.

The previous prime is 538679681. The next prime is 538679693. The reversal of 538679689 is 986976835.

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 50623225 + 488056464 = 7115^2 + 22092^2 .

It is a cyclic number.

It is not a de Polignac number, because 538679689 - 2³ = 538679681 is a prime.

It is a super-2 number, since 2×538679689² = 580351614682273442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538679681) 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, 6569224 + ... + 6569305.

It is an arithmetic number, because the mean of its divisors is an integer number (137954565).

Almost surely, 2^538679689 is an apocalyptic number.

It is an amenable number.

538679689 is a deficient number, since it is larger than the sum of its proper divisors (13138571).

538679689 is a wasteful number, since it uses less digits than its factorization.

538679689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13138570.

The product of its digits is 19595520, while the sum is 61.

The square root of 538679689 is about 23209.4741215737. The cubic root of 538679689 is about 813.6610627017.

The spelling of 538679689 in words is "five hundred thirty-eight million, six hundred seventy-nine thousand, six hundred eighty-nine".