54685139 has 4 divisors (see below), whose sum is σ = 54701856. Its totient is φ = 54668424.

The previous prime is 54685109. The next prime is 54685171. The reversal of 54685139 is 93158645.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54685139 - 2¹² = 54681043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54685096 and 54685105.

It is not an unprimeable number, because it can be changed into a prime (54685109) 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, 1664 + ... + 10589.

It is an arithmetic number, because the mean of its divisors is an integer number (13675464).

Almost surely, 2^54685139 is an apocalyptic number.

54685139 is a deficient number, since it is larger than the sum of its proper divisors (16717).

54685139 is a wasteful number, since it uses less digits than its factorization.

54685139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16716.

The product of its digits is 129600, while the sum is 41.

The square root of 54685139 is about 7394.9400944159. The cubic root of 54685139 is about 379.5681590161.

The spelling of 54685139 in words is "fifty-four million, six hundred eighty-five thousand, one hundred thirty-nine".