54138769 has 4 divisors (see below), whose sum is σ = 54156580. Its totient is φ = 54120960.

The previous prime is 54138731. The next prime is 54138787. The reversal of 54138769 is 96783145.

54138769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 35760400 + 18378369 = 5980^2 + 4287^2 .

It is a cyclic number.

It is not a de Polignac number, because 54138769 - 2⁷ = 54138641 is a prime.

It is a super-2 number, since 2×54138769² = 5862012617670722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54138709) 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, 3072 + ... + 10849.

It is an arithmetic number, because the mean of its divisors is an integer number (13539145).

Almost surely, 2^54138769 is an apocalyptic number.

It is an amenable number.

54138769 is a deficient number, since it is larger than the sum of its proper divisors (17811).

54138769 is a wasteful number, since it uses less digits than its factorization.

54138769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17810.

The product of its digits is 181440, while the sum is 43.

The square root of 54138769 is about 7357.9052046082. The cubic root of 54138769 is about 378.2998120641.

The spelling of 54138769 in words is "fifty-four million, one hundred thirty-eight thousand, seven hundred sixty-nine".