55567789 has 2 divisors, whose sum is σ = 55567790. Its totient is φ = 55567788.

The previous prime is 55567777. The next prime is 55567801. The reversal of 55567789 is 98776555.

It is a balanced prime because it is at equal distance from previous prime (55567777) and next prime (55567801).

It can be written as a sum of positive squares in only one way, i.e., 49589764 + 5978025 = 7042^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 55567789 - 2⁷ = 55567661 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55567289) 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, 27783894 + 27783895.

It is an arithmetic number, because the mean of its divisors is an integer number (27783895).

Almost surely, 2^55567789 is an apocalyptic number.

It is an amenable number.

55567789 is a deficient number, since it is larger than the sum of its proper divisors (1).

55567789 is an equidigital number, since it uses as much as digits as its factorization.

55567789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 52.

The square root of 55567789 is about 7454.3805242287. The cubic root of 55567789 is about 381.5994197251.

The spelling of 55567789 in words is "fifty-five million, five hundred sixty-seven thousand, seven hundred eighty-nine".