55599389 has 4 divisors (see below), whose sum is σ = 56149980. Its totient is φ = 55048800.

The previous prime is 55599373. The next prime is 55599437. The reversal of 55599389 is 98399555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98399555 = 5 ⋅19679911.

It can be written as a sum of positive squares in 2 ways, for example, as 41499364 + 14100025 = 6442^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 55599389 - 2⁴ = 55599373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55599389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55599359) 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 in 3 ways as a sum of consecutive naturals, for example, 275144 + ... + 275345.

It is an arithmetic number, because the mean of its divisors is an integer number (14037495).

Almost surely, 2^55599389 is an apocalyptic number.

It is an amenable number.

55599389 is a deficient number, since it is larger than the sum of its proper divisors (550591).

55599389 is a wasteful number, since it uses less digits than its factorization.

55599389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550590.

The product of its digits is 2187000, while the sum is 53.

The square root of 55599389 is about 7456.4997820693. The cubic root of 55599389 is about 381.6717413393.

The spelling of 55599389 in words is "fifty-five million, five hundred ninety-nine thousand, three hundred eighty-nine".