64220099 has 2 divisors, whose sum is σ = 64220100. Its totient is φ = 64220098.

The previous prime is 64220087. The next prime is 64220119. The reversal of 64220099 is 99002246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64220099 - 2⁴ = 64220083 is a prime.

It is a super-2 number, since 2×64220099² = 8248442231139602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64220069) 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, 32110049 + 32110050.

It is an arithmetic number, because the mean of its divisors is an integer number (32110050).

Almost surely, 2^64220099 is an apocalyptic number.

64220099 is a deficient number, since it is larger than the sum of its proper divisors (1).

64220099 is an equidigital number, since it uses as much as digits as its factorization.

64220099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 64220099 is about 8013.7443807499. The cubic root of 64220099 is about 400.4580149390.

The spelling of 64220099 in words is "sixty-four million, two hundred twenty thousand, ninety-nine".