1945633339 has 16 divisors (see below), whose sum is σ = 2149084224. Its totient is φ = 1750320000.

The previous prime is 1945633337. The next prime is 1945633343. The reversal of 1945633339 is 9333365491.

It is not a de Polignac number, because 1945633339 - 2¹ = 1945633337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945633331) 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, 94689 + ... + 113389.

It is an arithmetic number, because the mean of its divisors is an integer number (134317764).

Almost surely, 2^1945633339 is an apocalyptic number.

1945633339 is a deficient number, since it is larger than the sum of its proper divisors (203450885).

1945633339 is a wasteful number, since it uses less digits than its factorization.

1945633339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18918.

The product of its digits is 787320, while the sum is 46.

The square root of 1945633339 is about 44109.3339215182. Note that the first 3 decimals coincide. The cubic root of 1945633339 is about 1248.3997311727.

The spelling of 1945633339 in words is "one billion, nine hundred forty-five million, six hundred thirty-three thousand, three hundred thirty-nine".