64823219 has 2 divisors, whose sum is σ = 64823220. Its totient is φ = 64823218.

The previous prime is 64823191. The next prime is 64823233. The reversal of 64823219 is 91232846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64823219 - 2⁸ = 64822963 is a prime.

It is a super-2 number, since 2×64823219² = 8404099443043922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64883219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32411609 + 32411610.

It is an arithmetic number, because the mean of its divisors is an integer number (32411610).

Almost surely, 2^64823219 is an apocalyptic number.

64823219 is a deficient number, since it is larger than the sum of its proper divisors (1).

64823219 is an equidigital number, since it uses as much as digits as its factorization.

64823219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 64823219 is about 8051.2867915632. The cubic root of 64823219 is about 401.7077382824.

The spelling of 64823219 in words is "sixty-four million, eight hundred twenty-three thousand, two hundred nineteen".