1105306991 has 2 divisors, whose sum is σ = 1105306992. Its totient is φ = 1105306990.

The previous prime is 1105306963. The next prime is 1105306999. The reversal of 1105306991 is 1996035011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1105306991 - 2⁶ = 1105306927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105306999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552653495 + 552653496.

It is an arithmetic number, because the mean of its divisors is an integer number (552653496).

Almost surely, 2^1105306991 is an apocalyptic number.

1105306991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105306991 is an equidigital number, since it uses as much as digits as its factorization.

1105306991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 1105306991 is about 33246.1575373757. The cubic root of 1105306991 is about 1033.9375441626.

The spelling of 1105306991 in words is "one billion, one hundred five million, three hundred six thousand, nine hundred ninety-one".