669470993 has 2 divisors, whose sum is σ = 669470994. Its totient is φ = 669470992.

The previous prime is 669470953. The next prime is 669471017. The reversal of 669470993 is 399074966.

669470993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499611904 + 169859089 = 22352^2 + 13033^2 .

It is a cyclic number.

It is not a de Polignac number, because 669470993 - 2⁶ = 669470929 is a prime.

It is not a weakly prime, because it can be changed into another prime (669470953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334735496 + 334735497.

It is an arithmetic number, because the mean of its divisors is an integer number (334735497).

Almost surely, 2^669470993 is an apocalyptic number.

It is an amenable number.

669470993 is a deficient number, since it is larger than the sum of its proper divisors (1).

669470993 is an equidigital number, since it uses as much as digits as its factorization.

669470993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The square root of 669470993 is about 25874.1375315198. The cubic root of 669470993 is about 874.8036535766.

The spelling of 669470993 in words is "six hundred sixty-nine million, four hundred seventy thousand, nine hundred ninety-three".