56061389 has 2 divisors, whose sum is σ = 56061390. Its totient is φ = 56061388.

The previous prime is 56061377. The next prime is 56061407. The reversal of 56061389 is 98316065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43692100 + 12369289 = 6610^2 + 3517^2 .

It is a cyclic number.

It is not a de Polignac number, because 56061389 - 2¹² = 56057293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56061329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28030694 + 28030695.

It is an arithmetic number, because the mean of its divisors is an integer number (28030695).

Almost surely, 2^56061389 is an apocalyptic number.

It is an amenable number.

56061389 is a deficient number, since it is larger than the sum of its proper divisors (1).

56061389 is an equidigital number, since it uses as much as digits as its factorization.

56061389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 56061389 is about 7487.4153751478. The cubic root of 56061389 is about 382.7259866107.

The spelling of 56061389 in words is "fifty-six million, sixty-one thousand, three hundred eighty-nine".