1193981445 has 16 divisors (see below), whose sum is σ = 2122633920. Its totient is φ = 636790032.

The previous prime is 1193981443. The next prime is 1193981449. The reversal of 1193981445 is 5441893911.

1193981445 is a `hidden beast` number, since 119 + 3 + 98 + 1 + 445 = 666.

It is not a de Polignac number, because 1193981445 - 2¹ = 1193981443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1193981445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1193981443) 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, 4422019 + ... + 4422288.

It is an arithmetic number, because the mean of its divisors is an integer number (132664620).

Almost surely, 2^1193981445 is an apocalyptic number.

1193981445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1193981445 is a deficient number, since it is larger than the sum of its proper divisors (928652475).

1193981445 is an equidigital number, since it uses as much as digits as its factorization.

1193981445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8844321 (or 8844315 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1193981445 is about 34554.0365948756. The cubic root of 1193981445 is about 1060.8790160297.

The spelling of 1193981445 in words is "one billion, one hundred ninety-three million, nine hundred eighty-one thousand, four hundred forty-five".