538081549 has 4 divisors (see below), whose sum is σ = 546902620. Its totient is φ = 529260480.

The previous prime is 538081543. The next prime is 538081553. The reversal of 538081549 is 945180835.

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 122655625 + 415425924 = 11075^2 + 20382^2 .

It is a cyclic number.

It is not a de Polignac number, because 538081549 - 2³ = 538081541 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 (538081541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4410444 + ... + 4410565.

It is an arithmetic number, because the mean of its divisors is an integer number (136725655).

Almost surely, 2^538081549 is an apocalyptic number.

It is an amenable number.

538081549 is a deficient number, since it is larger than the sum of its proper divisors (8821071).

538081549 is an equidigital number, since it uses as much as digits as its factorization.

538081549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8821070.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 538081549 is about 23196.5848563964. The cubic root of 538081549 is about 813.3597930827.

The spelling of 538081549 in words is "five hundred thirty-eight million, eighty-one thousand, five hundred forty-nine".