64363261 has 2 divisors, whose sum is σ = 64363262. Its totient is φ = 64363260.

The previous prime is 64363259. The next prime is 64363289. The reversal of 64363261 is 16236346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34047225 + 30316036 = 5835^2 + 5506^2 .

It is a cyclic number.

It is not a de Polignac number, because 64363261 - 2¹ = 64363259 is a prime.

Together with 64363259, 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 (64363291) 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, 32181630 + 32181631.

It is an arithmetic number, because the mean of its divisors is an integer number (32181631).

Almost surely, 2^64363261 is an apocalyptic number.

It is an amenable number.

64363261 is a deficient number, since it is larger than the sum of its proper divisors (1).

64363261 is an equidigital number, since it uses as much as digits as its factorization.

64363261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 64363261 is about 8022.6716871626. The cubic root of 64363261 is about 400.7553664061.

The spelling of 64363261 in words is "sixty-four million, three hundred sixty-three thousand, two hundred sixty-one".