54855687 has 4 divisors (see below), whose sum is σ = 73140920. Its totient is φ = 36570456.

The previous prime is 54855683. The next prime is 54855701. The reversal of 54855687 is 78655845.

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

It is not a de Polignac number, because 54855687 - 2² = 54855683 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 (54855683) 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, 9142612 + ... + 9142617.

It is an arithmetic number, because the mean of its divisors is an integer number (18285230).

Almost surely, 2^54855687 is an apocalyptic number.

54855687 is a deficient number, since it is larger than the sum of its proper divisors (18285233).

54855687 is a wasteful number, since it uses less digits than its factorization.

54855687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18285232.

The product of its digits is 1344000, while the sum is 48.

The square root of 54855687 is about 7406.4625159384. The cubic root of 54855687 is about 379.9623392963.

The spelling of 54855687 in words is "fifty-four million, eight hundred fifty-five thousand, six hundred eighty-seven".