64644299 has 2 divisors, whose sum is σ = 64644300. Its totient is φ = 64644298.

The previous prime is 64644287. The next prime is 64644311. The reversal of 64644299 is 99244646.

It is a balanced prime because it is at equal distance from previous prime (64644287) and next prime (64644311).

It is a cyclic number.

It is not a de Polignac number, because 64644299 - 2⁸ = 64644043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64644499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32322149 + 32322150.

It is an arithmetic number, because the mean of its divisors is an integer number (32322150).

Almost surely, 2^64644299 is an apocalyptic number.

64644299 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644299 is an equidigital number, since it uses as much as digits as its factorization.

64644299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The square root of 64644299 is about 8040.1678465067. The cubic root of 64644299 is about 401.3378102545.

The spelling of 64644299 in words is "sixty-four million, six hundred forty-four thousand, two hundred ninety-nine".