55443697 has 4 divisors (see below), whose sum is σ = 55565476. Its totient is φ = 55321920.

The previous prime is 55443683. The next prime is 55443733. The reversal of 55443697 is 79634455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79634455 = 5 ⋅15926891.

It can be written as a sum of positive squares in 2 ways, for example, as 46226401 + 9217296 = 6799^2 + 3036^2 .

It is a cyclic number.

It is not a de Polignac number, because 55443697 - 2⁷ = 55443569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55443607) 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, 60204 + ... + 61117.

It is an arithmetic number, because the mean of its divisors is an integer number (13891369).

Almost surely, 2^55443697 is an apocalyptic number.

It is an amenable number.

55443697 is a deficient number, since it is larger than the sum of its proper divisors (121779).

55443697 is a wasteful number, since it uses less digits than its factorization.

55443697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121778.

The product of its digits is 453600, while the sum is 43.

The square root of 55443697 is about 7446.0524440807. The cubic root of 55443697 is about 381.3151499519.

The spelling of 55443697 in words is "fifty-five million, four hundred forty-three thousand, six hundred ninety-seven".