1166933891 has 2 divisors, whose sum is σ = 1166933892. Its totient is φ = 1166933890.

The previous prime is 1166933881. The next prime is 1166933897. The reversal of 1166933891 is 1983396611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166933891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1166933897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583466945 + 583466946.

It is an arithmetic number, because the mean of its divisors is an integer number (583466946).

Almost surely, 2^1166933891 is an apocalyptic number.

1166933891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166933891 is an equidigital number, since it uses as much as digits as its factorization.

1166933891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 1166933891 is about 34160.4140929234. The cubic root of 1166933891 is about 1052.8069689489.

The spelling of 1166933891 in words is "one billion, one hundred sixty-six million, nine hundred thirty-three thousand, eight hundred ninety-one".