64343261 has 2 divisors, whose sum is σ = 64343262. Its totient is φ = 64343260.

The previous prime is 64343243. The next prime is 64343269. The reversal of 64343261 is 16234346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 4280761 = 7750^2 + 2069^2 .

It is a cyclic number.

It is not a de Polignac number, because 64343261 - 2¹⁰ = 64342237 is a prime.

It is a super-2 number, since 2×64343261² = 8280110472228242, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3804194 and since 64343261 and 3804194 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64343269) 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, 32171630 + 32171631.

It is an arithmetic number, because the mean of its divisors is an integer number (32171631).

Almost surely, 2^64343261 is an apocalyptic number.

It is an amenable number.

64343261 is a deficient number, since it is larger than the sum of its proper divisors (1).

64343261 is an equidigital number, since it uses as much as digits as its factorization.

64343261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 29.

The square root of 64343261 is about 8021.4251227572. The cubic root of 64343261 is about 400.7138523625.

The spelling of 64343261 in words is "sixty-four million, three hundred forty-three thousand, two hundred sixty-one".