1945603882 has 4 divisors (see below), whose sum is σ = 2918405826. Its totient is φ = 972801940.

The previous prime is 1945603867. The next prime is 1945603889. The reversal of 1945603882 is 2883065491.

It is a Cunningham number, because it is equal to 44109²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1945603881 + 1 = 44109^2 + 1^2 .

It is not an unprimeable number, because it can be changed into a prime (1945603889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486400969 + ... + 486400972.

Almost surely, 2^1945603882 is an apocalyptic number.

1945603882 is a deficient number, since it is larger than the sum of its proper divisors (972801944).

1945603882 is an equidigital number, since it uses as much as digits as its factorization.

1945603882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972801943.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 1945603882 is about 44109.0000113356. Note that the first 4 decimals coincide. The cubic root of 1945603882 is about 1248.3934308598.

The spelling of 1945603882 in words is "one billion, nine hundred forty-five million, six hundred three thousand, eight hundred eighty-two".