1178947939 has 4 divisors (see below), whose sum is σ = 1269636256. Its totient is φ = 1088259624.

The previous prime is 1178947921. The next prime is 1178947951. The reversal of 1178947939 is 9397498711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9397498711 = 1087 ⋅8645353.

It is a cyclic number.

It is not a de Polignac number, because 1178947939 - 2¹³ = 1178939747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1178947969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45344139 + ... + 45344164.

It is an arithmetic number, because the mean of its divisors is an integer number (317409064).

Almost surely, 2^1178947939 is an apocalyptic number.

1178947939 is a deficient number, since it is larger than the sum of its proper divisors (90688317).

1178947939 is an equidigital number, since it uses as much as digits as its factorization.

1178947939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90688316.

The product of its digits is 3429216, while the sum is 58.

The square root of 1178947939 is about 34335.8113199616. The cubic root of 1178947939 is about 1056.4076622185.

The spelling of 1178947939 in words is "one billion, one hundred seventy-eight million, nine hundred forty-seven thousand, nine hundred thirty-nine".