64194427 has 4 divisors (see below), whose sum is σ = 70030296. Its totient is φ = 58358560.

The previous prime is 64194421. The next prime is 64194451. The reversal of 64194427 is 72449146.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64194427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64194421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2917918 + ... + 2917939.

It is an arithmetic number, because the mean of its divisors is an integer number (17507574).

Almost surely, 2^64194427 is an apocalyptic number.

64194427 is a deficient number, since it is larger than the sum of its proper divisors (5835869).

64194427 is a wasteful number, since it uses less digits than its factorization.

64194427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835868.

The product of its digits is 48384, while the sum is 37.

The square root of 64194427 is about 8012.1424725226. The cubic root of 64194427 is about 400.4046467645.

It can be divided in two parts, 64 and 194427, that added together give a palindrome (194491).

The spelling of 64194427 in words is "sixty-four million, one hundred ninety-four thousand, four hundred twenty-seven".