65078189 has 4 divisors (see below), whose sum is σ = 70994400. Its totient is φ = 59161980.

The previous prime is 65078177. The next prime is 65078191. The reversal of 65078189 is 98187056.

It is a happy number.

65078189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 65078189 - 2⁸ = 65077933 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65078129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2958089 + ... + 2958110.

It is an arithmetic number, because the mean of its divisors is an integer number (17748600).

Almost surely, 2^65078189 is an apocalyptic number.

It is an amenable number.

65078189 is a deficient number, since it is larger than the sum of its proper divisors (5916211).

65078189 is a wasteful number, since it uses less digits than its factorization.

65078189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916210.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 65078189 is about 8067.1053668587. The cubic root of 65078189 is about 402.2337299898.

The spelling of 65078189 in words is "sixty-five million, seventy-eight thousand, one hundred eighty-nine".