1171981067 has 2 divisors, whose sum is σ = 1171981068. Its totient is φ = 1171981066.

The previous prime is 1171981033. The next prime is 1171981087. The reversal of 1171981067 is 7601891711.

It is a strong prime.

It is an emirp because it is prime and its reverse (7601891711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1171981067 - 2⁸ = 1171980811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171981007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585990533 + 585990534.

It is an arithmetic number, because the mean of its divisors is an integer number (585990534).

Almost surely, 2^1171981067 is an apocalyptic number.

1171981067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171981067 is an equidigital number, since it uses as much as digits as its factorization.

1171981067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 41.

The square root of 1171981067 is about 34234.2090167131. The cubic root of 1171981067 is about 1054.3226388000.

The spelling of 1171981067 in words is "one billion, one hundred seventy-one million, nine hundred eighty-one thousand, sixty-seven".