1209997683 has 20 divisors (see below), whose sum is σ = 1849568248. Its totient is φ = 787903200.

The previous prime is 1209997681. The next prime is 1209997693. The reversal of 1209997683 is 3867999021.

It is not a de Polignac number, because 1209997683 - 2¹ = 1209997681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1209997681) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170218 + ... + 177183.

Almost surely, 2^1209997683 is an apocalyptic number.

1209997683 is a deficient number, since it is larger than the sum of its proper divisors (639570565).

1209997683 is an equidigital number, since it uses as much as digits as its factorization.

1209997683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347456 (or 347447 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 1209997683 is about 34785.0209573029. The cubic root of 1209997683 is about 1065.6015566008.

The spelling of 1209997683 in words is "one billion, two hundred nine million, nine hundred ninety-seven thousand, six hundred eighty-three".