1199611947 has 4 divisors (see below), whose sum is σ = 1599482600. Its totient is φ = 799741296.

The previous prime is 1199611939. The next prime is 1199611967. The reversal of 1199611947 is 7491169911.

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

It is not a de Polignac number, because 1199611947 - 2³ = 1199611939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1199611896 and 1199611905.

It is not an unprimeable number, because it can be changed into a prime (1199611927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199935322 + ... + 199935327.

It is an arithmetic number, because the mean of its divisors is an integer number (399870650).

Almost surely, 2^1199611947 is an apocalyptic number.

1199611947 is a deficient number, since it is larger than the sum of its proper divisors (399870653).

1199611947 is an equidigital number, since it uses as much as digits as its factorization.

1199611947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399870652.

The product of its digits is 122472, while the sum is 48.

The square root of 1199611947 is about 34635.4146358897. The cubic root of 1199611947 is about 1062.5440102093.

The spelling of 1199611947 in words is "one billion, one hundred ninety-nine million, six hundred eleven thousand, nine hundred forty-seven".