1916968249 has 24 divisors (see below), whose sum is σ = 2294103168. Its totient is φ = 1596500640.

The previous prime is 1916968213. The next prime is 1916968267. The reversal of 1916968249 is 9428696191.

It is not a de Polignac number, because 1916968249 - 2¹¹ = 1916966201 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1916968249.

It is not an unprimeable number, because it can be changed into a prime (1916968279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244224 + ... + 251950.

It is an arithmetic number, because the mean of its divisors is an integer number (95587632).

Almost surely, 2^1916968249 is an apocalyptic number.

It is an amenable number.

1916968249 is a deficient number, since it is larger than the sum of its proper divisors (377134919).

1916968249 is an equidigital number, since it uses as much as digits as its factorization.

1916968249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885 (or 7878 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 1916968249 is about 43783.1959660324. The cubic root of 1916968249 is about 1242.2384664111.

The spelling of 1916968249 in words is "one billion, nine hundred sixteen million, nine hundred sixty-eight thousand, two hundred forty-nine".