56784257 has 2 divisors, whose sum is σ = 56784258. Its totient is φ = 56784256.

The previous prime is 56784241. The next prime is 56784271. The reversal of 56784257 is 75248765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37503376 + 19280881 = 6124^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 56784257 - 2⁴ = 56784241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56784457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28392128 + 28392129.

It is an arithmetic number, because the mean of its divisors is an integer number (28392129).

Almost surely, 2^56784257 is an apocalyptic number.

It is an amenable number.

56784257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56784257 is an equidigital number, since it uses as much as digits as its factorization.

56784257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 44.

The square root of 56784257 is about 7535.5329605808. The cubic root of 56784257 is about 384.3639511839.

The spelling of 56784257 in words is "fifty-six million, seven hundred eighty-four thousand, two hundred fifty-seven".