64434121 has 2 divisors, whose sum is σ = 64434122. Its totient is φ = 64434120.

The previous prime is 64434091. The next prime is 64434157. The reversal of 64434121 is 12143446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58308496 + 6125625 = 7636^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 64434121 - 2⁹ = 64433609 is a prime.

It is not a weakly prime, because it can be changed into another prime (64434191) 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 as a sum of consecutive naturals, namely, 32217060 + 32217061.

It is an arithmetic number, because the mean of its divisors is an integer number (32217061).

Almost surely, 2^64434121 is an apocalyptic number.

It is an amenable number.

64434121 is a deficient number, since it is larger than the sum of its proper divisors (1).

64434121 is an equidigital number, since it uses as much as digits as its factorization.

64434121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 64434121 is about 8027.0867068944. The cubic root of 64434121 is about 400.9023814883.

Adding to 64434121 its reverse (12143446), we get a palindrome (76577567).

The spelling of 64434121 in words is "sixty-four million, four hundred thirty-four thousand, one hundred twenty-one".