55698389 has 4 divisors (see below), whose sum is σ = 56749356. Its totient is φ = 54647424.

The previous prime is 55698361. The next prime is 55698427. The reversal of 55698389 is 98389655.

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 44422225 + 11276164 = 6665^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 55698389 - 2¹⁶ = 55632853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1050913 = 55698389 / (5 + 5 + 6 + 9 + 8 + 3 + 8 + 9).

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 55698389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55698319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525404 + ... + 525509.

It is an arithmetic number, because the mean of its divisors is an integer number (14187339).

Almost surely, 2^55698389 is an apocalyptic number.

It is an amenable number.

55698389 is a deficient number, since it is larger than the sum of its proper divisors (1050967).

55698389 is a wasteful number, since it uses less digits than its factorization.

55698389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050966.

The product of its digits is 2332800, while the sum is 53.

The square root of 55698389 is about 7463.1353330889. The cubic root of 55698389 is about 381.8981412952.

The spelling of 55698389 in words is "fifty-five million, six hundred ninety-eight thousand, three hundred eighty-nine".