64220699 has 2 divisors, whose sum is σ = 64220700. Its totient is φ = 64220698.

The previous prime is 64220671. The next prime is 64220701. The reversal of 64220699 is 99602246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64220699 is a prime.

It is a Sophie Germain prime.

Together with 64220701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64220099) 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, 32110349 + 32110350.

It is an arithmetic number, because the mean of its divisors is an integer number (32110350).

Almost surely, 2^64220699 is an apocalyptic number.

64220699 is a deficient number, since it is larger than the sum of its proper divisors (1).

64220699 is an equidigital number, since it uses as much as digits as its factorization.

64220699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 64220699 is about 8013.7818163461. The cubic root of 64220699 is about 400.4592620774.

The spelling of 64220699 in words is "sixty-four million, two hundred twenty thousand, six hundred ninety-nine".