538668641 has 4 divisors (see below), whose sum is σ = 615621312. Its totient is φ = 461715972.

The previous prime is 538668631. The next prime is 538668667. The reversal of 538668641 is 146866835.

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 538668641 - 2¹⁰ = 538667617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538668631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38476325 + ... + 38476338.

It is an arithmetic number, because the mean of its divisors is an integer number (153905328).

Almost surely, 2^538668641 is an apocalyptic number.

It is an amenable number.

538668641 is a deficient number, since it is larger than the sum of its proper divisors (76952671).

538668641 is an equidigital number, since it uses as much as digits as its factorization.

538668641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76952670.

The product of its digits is 829440, while the sum is 47.

The square root of 538668641 is about 23209.2361140991. The cubic root of 538668641 is about 813.6555000955.

The spelling of 538668641 in words is "five hundred thirty-eight million, six hundred sixty-eight thousand, six hundred forty-one".