55784783 has 4 divisors (see below), whose sum is σ = 56296680. Its totient is φ = 55272888.

The previous prime is 55784767. The next prime is 55784791. The reversal of 55784783 is 38748755.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38748755 = 5 ⋅7749751.

It is a cyclic number.

It is not a de Polignac number, because 55784783 - 2⁴ = 55784767 is a prime.

It is a super-2 number, since 2×55784783² = 6223884028714178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55784083) 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, 255785 + ... + 256002.

It is an arithmetic number, because the mean of its divisors is an integer number (14074170).

Almost surely, 2^55784783 is an apocalyptic number.

55784783 is a deficient number, since it is larger than the sum of its proper divisors (511897).

55784783 is a wasteful number, since it uses less digits than its factorization.

55784783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511896.

The product of its digits is 940800, while the sum is 47.

The square root of 55784783 is about 7468.9211402986. The cubic root of 55784783 is about 382.0954938842.

The spelling of 55784783 in words is "fifty-five million, seven hundred eighty-four thousand, seven hundred eighty-three".