64344109 has 2 divisors, whose sum is σ = 64344110. Its totient is φ = 64344108.

The previous prime is 64344107. The next prime is 64344113. The reversal of 64344109 is 90144346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51883209 + 12460900 = 7203^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 64344109 - 2¹ = 64344107 is a prime.

Together with 64344107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64344107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32172054 + 32172055.

It is an arithmetic number, because the mean of its divisors is an integer number (32172055).

Almost surely, 2^64344109 is an apocalyptic number.

It is an amenable number.

64344109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64344109 is an equidigital number, since it uses as much as digits as its factorization.

64344109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 64344109 is about 8021.4779810207. The cubic root of 64344109 is about 400.7156127326.

The spelling of 64344109 in words is "sixty-four million, three hundred forty-four thousand, one hundred nine".