1168947391 has 2 divisors, whose sum is σ = 1168947392. Its totient is φ = 1168947390.

The previous prime is 1168947379. The next prime is 1168947419. The reversal of 1168947391 is 1937498611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1168947391 - 2¹³ = 1168939199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1168977391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584473695 + 584473696.

It is an arithmetic number, because the mean of its divisors is an integer number (584473696).

Almost surely, 2^1168947391 is an apocalyptic number.

1168947391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1168947391 is an equidigital number, since it uses as much as digits as its factorization.

1168947391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 1168947391 is about 34189.8726379611. The cubic root of 1168947391 is about 1053.4121471253.

The spelling of 1168947391 in words is "one billion, one hundred sixty-eight million, nine hundred forty-seven thousand, three hundred ninety-one".