64243345 has 4 divisors (see below), whose sum is σ = 77092020. Its totient is φ = 51394672.

The previous prime is 64243339. The next prime is 64243363. The reversal of 64243345 is 54334246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29680704 + 34562641 = 5448^2 + 5879^2 .

It is a cyclic number.

It is not a de Polignac number, because 64243345 - 2⁷ = 64243217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6424330 + ... + 6424339.

It is an arithmetic number, because the mean of its divisors is an integer number (19273005).

Almost surely, 2^64243345 is an apocalyptic number.

It is an amenable number.

64243345 is a deficient number, since it is larger than the sum of its proper divisors (12848675).

64243345 is a wasteful number, since it uses less digits than its factorization.

64243345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12848674.

The product of its digits is 34560, while the sum is 31.

The square root of 64243345 is about 8015.1946326961. The cubic root of 64243345 is about 400.5063275606.

Subtracting from 64243345 its reverse (54334246), we obtain a palindrome (9909099).

The spelling of 64243345 in words is "sixty-four million, two hundred forty-three thousand, three hundred forty-five".