54003639 has 4 divisors (see below), whose sum is σ = 72004856. Its totient is φ = 36002424.

The previous prime is 54003637. The next prime is 54003647. The reversal of 54003639 is 93630045.

It is a happy number.

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

It is not a de Polignac number, because 54003639 - 2¹ = 54003637 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 (54003637) 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, 9000604 + ... + 9000609.

It is an arithmetic number, because the mean of its divisors is an integer number (18001214).

Almost surely, 2^54003639 is an apocalyptic number.

54003639 is a deficient number, since it is larger than the sum of its proper divisors (18001217).

54003639 is a wasteful number, since it uses less digits than its factorization.

54003639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18001216.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 54003639 is about 7348.7168267664. The cubic root of 54003639 is about 377.9848052457.

The spelling of 54003639 in words is "fifty-four million, three thousand, six hundred thirty-nine".