538968989 has 4 divisors (see below), whose sum is σ = 580428156. Its totient is φ = 497509824.

The previous prime is 538968943. The next prime is 538969019. The reversal of 538968989 is 989869835.

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 188156089 + 350812900 = 13717^2 + 18730^2 .

It is a cyclic number.

It is not a de Polignac number, because 538968989 - 2¹² = 538964893 is a prime.

It is a super-2 number, since 2×538968989² = 580975142207364242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538968919) 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, 20729564 + ... + 20729589.

It is an arithmetic number, because the mean of its divisors is an integer number (145107039).

Almost surely, 2^538968989 is an apocalyptic number.

It is an amenable number.

538968989 is a deficient number, since it is larger than the sum of its proper divisors (41459167).

538968989 is a wasteful number, since it uses less digits than its factorization.

538968989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41459166.

The product of its digits is 33592320, while the sum is 65.

The square root of 538968989 is about 23215.7056537164. The cubic root of 538968989 is about 813.8066965687.

The spelling of 538968989 in words is "five hundred thirty-eight million, nine hundred sixty-eight thousand, nine hundred eighty-nine".