56728783 has 2 divisors, whose sum is σ = 56728784. Its totient is φ = 56728782.

The previous prime is 56728759. The next prime is 56728817. The reversal of 56728783 is 38782765.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56728783 - 2⁵ = 56728751 is a prime.

It is a super-2 number, since 2×56728783² = 6436309641322178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56728703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28364391 + 28364392.

It is an arithmetic number, because the mean of its divisors is an integer number (28364392).

Almost surely, 2^56728783 is an apocalyptic number.

56728783 is a deficient number, since it is larger than the sum of its proper divisors (1).

56728783 is an equidigital number, since it uses as much as digits as its factorization.

56728783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 56728783 is about 7531.8512332626. The cubic root of 56728783 is about 384.2387453955.

The spelling of 56728783 in words is "fifty-six million, seven hundred twenty-eight thousand, seven hundred eighty-three".