55784939 has 8 divisors (see below), whose sum is σ = 67504608. Its totient is φ = 45002880.

The previous prime is 55784923. The next prime is 55784947. The reversal of 55784939 is 93948755.

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 55784939 - 2⁴ = 55784923 is a prime.

It is a super-2 number, since 2×55784939² = 6223918838467442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55784999) 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, 234272 + ... + 234509.

It is an arithmetic number, because the mean of its divisors is an integer number (8438076).

Almost surely, 2^55784939 is an apocalyptic number.

55784939 is a deficient number, since it is larger than the sum of its proper divisors (11719669).

55784939 is a wasteful number, since it uses less digits than its factorization.

55784939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468805.

The product of its digits is 1360800, while the sum is 50.

The square root of 55784939 is about 7468.9315835667. The cubic root of 55784939 is about 382.0958500556.

The spelling of 55784939 in words is "fifty-five million, seven hundred eighty-four thousand, nine hundred thirty-nine".