54687643 has 4 divisors (see below), whose sum is σ = 57565960. Its totient is φ = 51809328.

The previous prime is 54687599. The next prime is 54687709. The reversal of 54687643 is 34678645.

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 54687643 - 2²¹ = 52590491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54687643.

It is not an unprimeable number, because it can be changed into a prime (54657643) 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, 1439130 + ... + 1439167.

It is an arithmetic number, because the mean of its divisors is an integer number (14391490).

Almost surely, 2^54687643 is an apocalyptic number.

54687643 is a deficient number, since it is larger than the sum of its proper divisors (2878317).

54687643 is a wasteful number, since it uses less digits than its factorization.

54687643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878316.

The product of its digits is 483840, while the sum is 43.

The square root of 54687643 is about 7395.1093974329. The cubic root of 54687643 is about 379.5739523278.

The spelling of 54687643 in words is "fifty-four million, six hundred eighty-seven thousand, six hundred forty-three".