55995109 has 4 divisors (see below), whose sum is σ = 58942240. Its totient is φ = 53047980.

The previous prime is 55995103. The next prime is 55995131. The reversal of 55995109 is 90159955.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90159955 = 5 ⋅18031991.

It is a cyclic number.

It is not a de Polignac number, because 55995109 - 2³ = 55995101 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 (55995101) 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, 1473537 + ... + 1473574.

It is an arithmetic number, because the mean of its divisors is an integer number (14735560).

Almost surely, 2^55995109 is an apocalyptic number.

It is an amenable number.

55995109 is a deficient number, since it is larger than the sum of its proper divisors (2947131).

55995109 is a wasteful number, since it uses less digits than its factorization.

55995109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947130.

The product of its (nonzero) digits is 91125, while the sum is 43.

The square root of 55995109 is about 7482.9879727285. The cubic root of 55995109 is about 382.5750979607.

The spelling of 55995109 in words is "fifty-five million, nine hundred ninety-five thousand, one hundred nine".