1199684385 has 16 divisors (see below), whose sum is σ = 2132772480. Its totient is φ = 639831600.

The previous prime is 1199684351. The next prime is 1199684389. The reversal of 1199684385 is 5834869911.

1199684385 is a `hidden beast` number, since 119 + 96 + 8 + 438 + 5 = 666.

It is not a de Polignac number, because 1199684385 - 2⁹ = 1199683873 is a prime.

It is a super-2 number, since 2×1199684385² = 2878485247225656450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1199684389) 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, 4443141 + ... + 4443410.

It is an arithmetic number, because the mean of its divisors is an integer number (133298280).

Almost surely, 2^1199684385 is an apocalyptic number.

1199684385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1199684385 is a deficient number, since it is larger than the sum of its proper divisors (933088095).

1199684385 is an equidigital number, since it uses as much as digits as its factorization.

1199684385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8886565 (or 8886559 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1199684385 is about 34636.4603416689. The cubic root of 1199684385 is about 1062.5653968513.

It can be divided in two parts, 1199 and 684385, that added together give a square (685584 = 828²).

The spelling of 1199684385 in words is "one billion, one hundred ninety-nine million, six hundred eighty-four thousand, three hundred eighty-five".