55405679 has 8 divisors (see below), whose sum is σ = 63556608. Its totient is φ = 47313720.

The previous prime is 55405673. The next prime is 55405699. The reversal of 55405679 is 97650455.

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

It is a cyclic number.

It is not a de Polignac number, because 55405679 - 2⁴ = 55405663 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 (55405673) 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, 12707 + ... + 16500.

It is an arithmetic number, because the mean of its divisors is an integer number (7944576).

Almost surely, 2^55405679 is an apocalyptic number.

55405679 is a deficient number, since it is larger than the sum of its proper divisors (8150929).

55405679 is a wasteful number, since it uses less digits than its factorization.

55405679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29485.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 55405679 is about 7443.4991099617. The cubic root of 55405679 is about 381.2279735013.

The spelling of 55405679 in words is "fifty-five million, four hundred five thousand, six hundred seventy-nine".