56641289 has 2 divisors, whose sum is σ = 56641290. Its totient is φ = 56641288.

The previous prime is 56641283. The next prime is 56641349. The reversal of 56641289 is 98214665.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56130064 + 511225 = 7492^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 56641289 - 2²⁴ = 39864073 is a prime.

It is not a weakly prime, because it can be changed into another prime (56641283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320644 + 28320645.

It is an arithmetic number, because the mean of its divisors is an integer number (28320645).

Almost surely, 2^56641289 is an apocalyptic number.

It is an amenable number.

56641289 is a deficient number, since it is larger than the sum of its proper divisors (1).

56641289 is an equidigital number, since it uses as much as digits as its factorization.

56641289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 56641289 is about 7526.0407253748. The cubic root of 56641289 is about 384.0411039080.

The spelling of 56641289 in words is "fifty-six million, six hundred forty-one thousand, two hundred eighty-nine".