64432149 has 4 divisors (see below), whose sum is σ = 85909536. Its totient is φ = 42954764.

The previous prime is 64432117. The next prime is 64432157. The reversal of 64432149 is 94123446.

64432149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64432149 - 2⁵ = 64432117 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 (64432169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10738689 + ... + 10738694.

It is an arithmetic number, because the mean of its divisors is an integer number (21477384).

Almost surely, 2^64432149 is an apocalyptic number.

It is an amenable number.

64432149 is a deficient number, since it is larger than the sum of its proper divisors (21477387).

64432149 is a wasteful number, since it uses less digits than its factorization.

64432149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21477386.

The product of its digits is 20736, while the sum is 33.

The square root of 64432149 is about 8026.9638718509. The cubic root of 64432149 is about 400.8982915871.

The spelling of 64432149 in words is "sixty-four million, four hundred thirty-two thousand, one hundred forty-nine".