64821233 has 2 divisors, whose sum is σ = 64821234. Its totient is φ = 64821232.

The previous prime is 64821209. The next prime is 64821271. The reversal of 64821233 is 33212846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62362609 + 2458624 = 7897^2 + 1568^2 .

It is a cyclic number.

It is not a de Polignac number, because 64821233 - 2¹⁰ = 64820209 is a prime.

It is equal to p_3830609 and since 64821233 and 3830609 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 64821196 and 64821205.

It is not a weakly prime, because it can be changed into another prime (64821283) 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, 32410616 + 32410617.

It is an arithmetic number, because the mean of its divisors is an integer number (32410617).

Almost surely, 2^64821233 is an apocalyptic number.

It is an amenable number.

64821233 is a deficient number, since it is larger than the sum of its proper divisors (1).

64821233 is an equidigital number, since it uses as much as digits as its factorization.

64821233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 64821233 is about 8051.1634562962. The cubic root of 64821233 is about 401.7036358444.

The spelling of 64821233 in words is "sixty-four million, eight hundred twenty-one thousand, two hundred thirty-three".