408363661 has 2 divisors, whose sum is σ = 408363662. Its totient is φ = 408363660.

The previous prime is 408363653. The next prime is 408363673. The reversal of 408363661 is 166363804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408282436 + 81225 = 20206^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 408363661 - 2³ = 408363653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408363661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408363601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204181830 + 204181831.

It is an arithmetic number, because the mean of its divisors is an integer number (204181831).

Almost surely, 2^408363661 is an apocalyptic number.

It is an amenable number.

408363661 is a deficient number, since it is larger than the sum of its proper divisors (1).

408363661 is an equidigital number, since it uses as much as digits as its factorization.

408363661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 408363661 is about 20208.0098228401. The cubic root of 408363661 is about 741.9062497344.

The spelling of 408363661 in words is "four hundred eight million, three hundred sixty-three thousand, six hundred sixty-one".