64378343 has 4 divisors (see below), whose sum is σ = 64969080. Its totient is φ = 63787608.

The previous prime is 64378339. The next prime is 64378427. The reversal of 64378343 is 34387346.

It is a happy number.

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 64378343 - 2² = 64378339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64378297 and 64378306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64378313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295205 + ... + 295422.

It is an arithmetic number, because the mean of its divisors is an integer number (16242270).

Almost surely, 2^64378343 is an apocalyptic number.

64378343 is a deficient number, since it is larger than the sum of its proper divisors (590737).

64378343 is a wasteful number, since it uses less digits than its factorization.

64378343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590736.

The product of its digits is 145152, while the sum is 38.

The square root of 64378343 is about 8023.6115932914. The cubic root of 64378343 is about 400.7866664588.

The spelling of 64378343 in words is "sixty-four million, three hundred seventy-eight thousand, three hundred forty-three".