408637949 has 2 divisors, whose sum is σ = 408637950. Its totient is φ = 408637948.

The previous prime is 408637907. The next prime is 408637951. The reversal of 408637949 is 949736804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406627225 + 2010724 = 20165^2 + 1418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408637949 is a prime.

Together with 408637951, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 408637897 and 408637906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408637969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204318974 + 204318975.

It is an arithmetic number, because the mean of its divisors is an integer number (204318975).

Almost surely, 2^408637949 is an apocalyptic number.

It is an amenable number.

408637949 is a deficient number, since it is larger than the sum of its proper divisors (1).

408637949 is an equidigital number, since it uses as much as digits as its factorization.

408637949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 408637949 is about 20214.7952994830. The cubic root of 408637949 is about 742.0723193897.

The spelling of 408637949 in words is "four hundred eight million, six hundred thirty-seven thousand, nine hundred forty-nine".