664193099 has 2 divisors, whose sum is σ = 664193100. Its totient is φ = 664193098.

The previous prime is 664193083. The next prime is 664193129. The reversal of 664193099 is 990391466.

664193099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664193099 - 2⁴ = 664193083 is a prime.

It is not a weakly prime, because it can be changed into another prime (664193029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332096549 + 332096550.

It is an arithmetic number, because the mean of its divisors is an integer number (332096550).

Almost surely, 2^664193099 is an apocalyptic number.

664193099 is a deficient number, since it is larger than the sum of its proper divisors (1).

664193099 is an equidigital number, since it uses as much as digits as its factorization.

664193099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 664193099 is about 25771.9440283421. The cubic root of 664193099 is about 872.4986955205.

The spelling of 664193099 in words is "six hundred sixty-four million, one hundred ninety-three thousand, ninety-nine".