1080766991 has 2 divisors, whose sum is σ = 1080766992. Its totient is φ = 1080766990.

The previous prime is 1080766979. The next prime is 1080767059. The reversal of 1080766991 is 1996670801.

It is a weak prime.

It is an emirp because it is prime and its reverse (1996670801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1080766991 - 2¹⁴ = 1080750607 is a prime.

It is a super-4 number, since 4×1080766991⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1080766901) 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, 540383495 + 540383496.

It is an arithmetic number, because the mean of its divisors is an integer number (540383496).

Almost surely, 2^1080766991 is an apocalyptic number.

1080766991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1080766991 is an equidigital number, since it uses as much as digits as its factorization.

1080766991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 1080766991 is about 32875.0207756588. The cubic root of 1080766991 is about 1026.2283876004.

The spelling of 1080766991 in words is "one billion, eighty million, seven hundred sixty-six thousand, nine hundred ninety-one".