54639387 has 16 divisors (see below), whose sum is σ = 88306560. Its totient is φ = 33114600.

The previous prime is 54639367. The next prime is 54639397. The reversal of 54639387 is 78393645.

54639387 is a `hidden beast` number, since 5 + 4 + 639 + 3 + 8 + 7 = 666.

It is not a de Polignac number, because 54639387 - 2²³ = 46250779 is a prime.

It is a super-2 number, since 2×54639387² = 5970925223471538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54639367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91689 + ... + 92282.

It is an arithmetic number, because the mean of its divisors is an integer number (5519160).

Almost surely, 2^54639387 is an apocalyptic number.

54639387 is a deficient number, since it is larger than the sum of its proper divisors (33667173).

54639387 is a wasteful number, since it uses less digits than its factorization.

54639387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183991 (or 183985 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 54639387 is about 7391.8459805383. The cubic root of 54639387 is about 379.4622749920.

The spelling of 54639387 in words is "fifty-four million, six hundred thirty-nine thousand, three hundred eighty-seven".