408145609 has 2 divisors, whose sum is σ = 408145610. Its totient is φ = 408145608.

The previous prime is 408145589. The next prime is 408145663. The reversal of 408145609 is 906541804.

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., 340033600 + 68112009 = 18440^2 + 8253^2 .

It is a cyclic number.

It is not a de Polignac number, because 408145609 - 2⁷ = 408145481 is a prime.

It is not a weakly prime, because it can be changed into another prime (708145609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204072804 + 204072805.

It is an arithmetic number, because the mean of its divisors is an integer number (204072805).

Almost surely, 2^408145609 is an apocalyptic number.

It is an amenable number.

408145609 is a deficient number, since it is larger than the sum of its proper divisors (1).

408145609 is an equidigital number, since it uses as much as digits as its factorization.

408145609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 408145609 is about 20202.6139150358. The cubic root of 408145609 is about 741.7741755078.

The spelling of 408145609 in words is "four hundred eight million, one hundred forty-five thousand, six hundred nine".