408019973 has 2 divisors, whose sum is σ = 408019974. Its totient is φ = 408019972.

The previous prime is 408019967. The next prime is 408019993. The reversal of 408019973 is 379910804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387381124 + 20638849 = 19682^2 + 4543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408019973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408019973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408019993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204009986 + 204009987.

It is an arithmetic number, because the mean of its divisors is an integer number (204009987).

Almost surely, 2^408019973 is an apocalyptic number.

It is an amenable number.

408019973 is a deficient number, since it is larger than the sum of its proper divisors (1).

408019973 is an equidigital number, since it uses as much as digits as its factorization.

408019973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 408019973 is about 20199.5042760955. The cubic root of 408019973 is about 741.6980563466.

The spelling of 408019973 in words is "four hundred eight million, nineteen thousand, nine hundred seventy-three".