55348639 has 4 divisors (see below), whose sum is σ = 55866024. Its totient is φ = 54831256.

The previous prime is 55348627. The next prime is 55348663. The reversal of 55348639 is 93684355.

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 55348639 - 2⁹ = 55348127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55348595 and 55348604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55348619) 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, 258532 + ... + 258745.

It is an arithmetic number, because the mean of its divisors is an integer number (13966506).

Almost surely, 2^55348639 is an apocalyptic number.

55348639 is a deficient number, since it is larger than the sum of its proper divisors (517385).

55348639 is a wasteful number, since it uses less digits than its factorization.

55348639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517384.

The product of its digits is 388800, while the sum is 43.

The square root of 55348639 is about 7439.6665919919. Note that the first 3 decimals coincide. The cubic root of 55348639 is about 381.0971041843.

The spelling of 55348639 in words is "fifty-five million, three hundred forty-eight thousand, six hundred thirty-nine".