64549427 has 4 divisors (see below), whose sum is σ = 64610880. Its totient is φ = 64487976.

The previous prime is 64549417. The next prime is 64549453. The reversal of 64549427 is 72494546.

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

It is a cyclic number.

It is not a de Polignac number, because 64549427 - 2⁴ = 64549411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64549417) 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, 29123 + ... + 31260.

It is an arithmetic number, because the mean of its divisors is an integer number (16152720).

Almost surely, 2^64549427 is an apocalyptic number.

64549427 is a deficient number, since it is larger than the sum of its proper divisors (61453).

64549427 is a wasteful number, since it uses less digits than its factorization.

64549427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61452.

The product of its digits is 241920, while the sum is 41.

The square root of 64549427 is about 8034.2658034197. The cubic root of 64549427 is about 401.1413796170.

The spelling of 64549427 in words is "sixty-four million, five hundred forty-nine thousand, four hundred twenty-seven".