54861389 has 4 divisors (see below), whose sum is σ = 59848800. Its totient is φ = 49873980.

The previous prime is 54861383. The next prime is 54861407. The reversal of 54861389 is 98316845.

54861389 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 54861389 - 2²⁰ = 53812813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54861383) 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, 2493689 + ... + 2493710.

It is an arithmetic number, because the mean of its divisors is an integer number (14962200).

Almost surely, 2^54861389 is an apocalyptic number.

It is an amenable number.

54861389 is a deficient number, since it is larger than the sum of its proper divisors (4987411).

54861389 is a wasteful number, since it uses less digits than its factorization.

54861389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4987410.

The product of its digits is 207360, while the sum is 44.

The square root of 54861389 is about 7406.8474400382. The cubic root of 54861389 is about 379.9755039611.

The spelling of 54861389 in words is "fifty-four million, eight hundred sixty-one thousand, three hundred eighty-nine".