56712209 has 2 divisors, whose sum is σ = 56712210. Its totient is φ = 56712208.

The previous prime is 56712199. The next prime is 56712239. The reversal of 56712209 is 90221765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 1254400 = 7447^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 56712209 - 2⁴ = 56712193 is a prime.

It is a Chen prime.

It is equal to p_3378326 and since 56712209 and 3378326 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56712239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28356104 + 28356105.

It is an arithmetic number, because the mean of its divisors is an integer number (28356105).

Almost surely, 2^56712209 is an apocalyptic number.

It is an amenable number.

56712209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56712209 is an equidigital number, since it uses as much as digits as its factorization.

56712209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 56712209 is about 7530.7508921754. The cubic root of 56712209 is about 384.2013217519.

The spelling of 56712209 in words is "fifty-six million, seven hundred twelve thousand, two hundred nine".