56982209 has 2 divisors, whose sum is σ = 56982210. Its totient is φ = 56982208.

The previous prime is 56982193. The next prime is 56982229. The reversal of 56982209 is 90228965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45859984 + 11122225 = 6772^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 56982209 - 2⁴ = 56982193 is a prime.

It is not a weakly prime, because it can be changed into another prime (56982229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28491104 + 28491105.

It is an arithmetic number, because the mean of its divisors is an integer number (28491105).

Almost surely, 2^56982209 is an apocalyptic number.

It is an amenable number.

56982209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56982209 is an equidigital number, since it uses as much as digits as its factorization.

56982209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 56982209 is about 7548.6561055595. The cubic root of 56982209 is about 384.8100687953.

Subtracting 56982209 from its reverse (90228965), we obtain a square (33246756 = 5766²).

The spelling of 56982209 in words is "fifty-six million, nine hundred eighty-two thousand, two hundred nine".