1409669809 has 2 divisors, whose sum is σ = 1409669810. Its totient is φ = 1409669808.

The previous prime is 1409669783. The next prime is 1409669813. The reversal of 1409669809 is 9089669041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1398760000 + 10909809 = 37400^2 + 3303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1409669809 - 2²³ = 1401281201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1409661809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704834904 + 704834905.

It is an arithmetic number, because the mean of its divisors is an integer number (704834905).

Almost surely, 2^1409669809 is an apocalyptic number.

It is an amenable number.

1409669809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1409669809 is an equidigital number, since it uses as much as digits as its factorization.

1409669809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 1409669809 is about 37545.5697652866. The cubic root of 1409669809 is about 1121.2586320808.

The spelling of 1409669809 in words is "one billion, four hundred nine million, six hundred sixty-nine thousand, eight hundred nine".