1178091643 has 2 divisors, whose sum is σ = 1178091644. Its totient is φ = 1178091642.

The previous prime is 1178091641. The next prime is 1178091659. The reversal of 1178091643 is 3461908711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1178091643 - 2¹ = 1178091641 is a prime.

Together with 1178091641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1178091596 and 1178091605.

It is not a weakly prime, because it can be changed into another prime (1178091641) 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 as a sum of consecutive naturals, namely, 589045821 + 589045822.

It is an arithmetic number, because the mean of its divisors is an integer number (589045822).

Almost surely, 2^1178091643 is an apocalyptic number.

1178091643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1178091643 is an equidigital number, since it uses as much as digits as its factorization.

1178091643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1178091643 is about 34323.3396248092. The cubic root of 1178091643 is about 1056.1518361768.

The spelling of 1178091643 in words is "one billion, one hundred seventy-eight million, ninety-one thousand, six hundred forty-three".