64549387 has 4 divisors (see below), whose sum is σ = 73770736. Its totient is φ = 55328040.

The previous prime is 64549367. The next prime is 64549393. The reversal of 64549387 is 78394546.

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 64549387 - 2⁷ = 64549259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64549307) 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, 4610664 + ... + 4610677.

It is an arithmetic number, because the mean of its divisors is an integer number (18442684).

Almost surely, 2^64549387 is an apocalyptic number.

64549387 is a deficient number, since it is larger than the sum of its proper divisors (9221349).

64549387 is an equidigital number, since it uses as much as digits as its factorization.

64549387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221348.

The product of its digits is 725760, while the sum is 46.

The square root of 64549387 is about 8034.2633140818. The cubic root of 64549387 is about 401.1412967572.

The spelling of 64549387 in words is "sixty-four million, five hundred forty-nine thousand, three hundred eighty-seven".