64549389 has 16 divisors (see below), whose sum is σ = 90720000. Its totient is φ = 40762176.

The previous prime is 64549367. The next prime is 64549393. The reversal of 64549389 is 98394546.

It is not a de Polignac number, because 64549389 - 2²³ = 56160781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64549319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2389 + ... + 11610.

It is an arithmetic number, because the mean of its divisors is an integer number (5670000).

Almost surely, 2^64549389 is an apocalyptic number.

It is an amenable number.

64549389 is a deficient number, since it is larger than the sum of its proper divisors (26170611).

64549389 is a wasteful number, since it uses less digits than its factorization.

64549389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14084.

The product of its digits is 933120, while the sum is 48.

The square root of 64549389 is about 8034.2634385487. The cubic root of 64549389 is about 401.1413009002.

The spelling of 64549389 in words is "sixty-four million, five hundred forty-nine thousand, three hundred eighty-nine".