64383649 has 4 divisors (see below), whose sum is σ = 70236720. Its totient is φ = 58530580.

The previous prime is 64383643. The next prime is 64383661. The reversal of 64383649 is 94638346.

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 64383649 - 2⁷ = 64383521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64383643) 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, 2926519 + ... + 2926540.

It is an arithmetic number, because the mean of its divisors is an integer number (17559180).

Almost surely, 2^64383649 is an apocalyptic number.

It is an amenable number.

64383649 is a deficient number, since it is larger than the sum of its proper divisors (5853071).

64383649 is a wasteful number, since it uses less digits than its factorization.

64383649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853070.

The product of its digits is 373248, while the sum is 43.

The square root of 64383649 is about 8023.9422355847. The cubic root of 64383649 is about 400.7976769712.

The spelling of 64383649 in words is "sixty-four million, three hundred eighty-three thousand, six hundred forty-nine".