363968609 has 2 divisors, whose sum is σ = 363968610. Its totient is φ = 363968608.

The previous prime is 363968599. The next prime is 363968621. The reversal of 363968609 is 906869363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359216209 + 4752400 = 18953^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 363968609 - 2²⁸ = 95533153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (363968309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181984304 + 181984305.

It is an arithmetic number, because the mean of its divisors is an integer number (181984305).

Almost surely, 2^363968609 is an apocalyptic number.

It is an amenable number.

363968609 is a deficient number, since it is larger than the sum of its proper divisors (1).

363968609 is an equidigital number, since it uses as much as digits as its factorization.

363968609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The square root of 363968609 is about 19077.9613428689. The cubic root of 363968609 is about 713.9831726112.

The spelling of 363968609 in words is "three hundred sixty-three million, nine hundred sixty-eight thousand, six hundred nine".