54136639 has 4 divisors (see below), whose sum is σ = 54153360. Its totient is φ = 54119920.

The previous prime is 54136637. The next prime is 54136651. The reversal of 54136639 is 93663145.

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 54136639 - 2¹ = 54136637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54136598 and 54136607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54136631) 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, 1774 + ... + 10555.

It is an arithmetic number, because the mean of its divisors is an integer number (13538340).

Almost surely, 2^54136639 is an apocalyptic number.

54136639 is a deficient number, since it is larger than the sum of its proper divisors (16721).

54136639 is a wasteful number, since it uses less digits than its factorization.

54136639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16720.

The product of its digits is 58320, while the sum is 37.

The square root of 54136639 is about 7357.7604609011. The cubic root of 54136639 is about 378.2948508063.

The spelling of 54136639 in words is "fifty-four million, one hundred thirty-six thousand, six hundred thirty-nine".