55831789 has 4 divisors (see below), whose sum is σ = 60126556. Its totient is φ = 51537024.

The previous prime is 55831753. The next prime is 55831793. The reversal of 55831789 is 98713855.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32114889 + 23716900 = 5667^2 + 4870^2 .

It is a cyclic number.

It is not a de Polignac number, because 55831789 - 2¹⁵ = 55799021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55831729) 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 in 3 ways as a sum of consecutive naturals, for example, 2147364 + ... + 2147389.

It is an arithmetic number, because the mean of its divisors is an integer number (15031639).

Almost surely, 2^55831789 is an apocalyptic number.

It is an amenable number.

55831789 is a deficient number, since it is larger than the sum of its proper divisors (4294767).

55831789 is a wasteful number, since it uses less digits than its factorization.

55831789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294766.

The product of its digits is 302400, while the sum is 46.

The square root of 55831789 is about 7472.0672507680. The cubic root of 55831789 is about 382.2027856186.

The spelling of 55831789 in words is "fifty-five million, eight hundred thirty-one thousand, seven hundred eighty-nine".