1420969209 has 16 divisors (see below), whose sum is σ = 2067747264. Its totient is φ = 860825600.

The previous prime is 1420969181. The next prime is 1420969217. The reversal of 1420969209 is 9029690241.

It is a cyclic number.

It is not a de Polignac number, because 1420969209 - 2²⁰ = 1419920633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1420969229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83029 + ... + 98669.

It is an arithmetic number, because the mean of its divisors is an integer number (129234204).

Almost surely, 2^1420969209 is an apocalyptic number.

It is an amenable number.

1420969209 is a deficient number, since it is larger than the sum of its proper divisors (646778055).

1420969209 is a wasteful number, since it uses less digits than its factorization.

1420969209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18408.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1420969209 is about 37695.7452373607. The cubic root of 1420969209 is about 1124.2465299444.

The spelling of 1420969209 in words is "one billion, four hundred twenty million, nine hundred sixty-nine thousand, two hundred nine".