54687309 has 4 divisors (see below), whose sum is σ = 72916416. Its totient is φ = 36458204.

The previous prime is 54687299. The next prime is 54687331. The reversal of 54687309 is 90378645.

It is a happy number.

54687309 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, 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 54687309 - 2¹⁶ = 54621773 is a prime.

It is a super-2 number, since 2×54687309² = 5981403531322962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54687109) 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, 9114549 + ... + 9114554.

It is an arithmetic number, because the mean of its divisors is an integer number (18229104).

Almost surely, 2^54687309 is an apocalyptic number.

It is an amenable number.

54687309 is a deficient number, since it is larger than the sum of its proper divisors (18229107).

54687309 is a wasteful number, since it uses less digits than its factorization.

54687309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18229106.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 54687309 is about 7395.0868149062. The cubic root of 54687309 is about 379.5731795879.

The spelling of 54687309 in words is "fifty-four million, six hundred eighty-seven thousand, three hundred nine".