54591639 has 8 divisors (see below), whose sum is σ = 74481792. Its totient is φ = 35547960.

The previous prime is 54591637. The next prime is 54591679. The reversal of 54591639 is 93619545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 54591639 - 2¹ = 54591637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54591639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54591631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211467 + ... + 211724.

It is an arithmetic number, because the mean of its divisors is an integer number (9310224).

Almost surely, 2^54591639 is an apocalyptic number.

54591639 is a deficient number, since it is larger than the sum of its proper divisors (19890153).

54591639 is a wasteful number, since it uses less digits than its factorization.

54591639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423237.

The product of its digits is 145800, while the sum is 42.

The square root of 54591639 is about 7388.6154995371. The cubic root of 54591639 is about 379.3517085670.

The spelling of 54591639 in words is "fifty-four million, five hundred ninety-one thousand, six hundred thirty-nine".