64641337 has 2 divisors, whose sum is σ = 64641338.
Its totient is φ = 64641336.
The previous prime is 64641307. The next prime is 64641383. The reversal of 64641337 is 73314646.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 63824121 + 817216 = 7989^2 + 904^2
It is a cyclic number.
It is not a de Polignac number, because 64641337 - 219 = 64117049 is a prime.
It is not a weakly prime, because it can be changed into another prime (64641307) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32320668 + 32320669.
It is an arithmetic number, because the mean of its divisors is an integer number (32320669).
Almost surely, 264641337 is an apocalyptic number.
It is an amenable number.
64641337 is a deficient number, since it is larger than the sum of its proper divisors (1).
64641337 is an equidigital number, since it uses as much as digits as its factorization.
64641337 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 36288, while the sum is 34.
The square root of 64641337 is about 8039.9836442620.
The cubic root of 64641337 is about 401.3316803984.
The spelling of 64641337 in words is "sixty-four million, six hundred forty-one thousand, three hundred thirty-seven".