1105537991 has 2 divisors, whose sum is σ = 1105537992. Its totient is φ = 1105537990.

The previous prime is 1105537969. The next prime is 1105538039. The reversal of 1105537991 is 1997355011.

It is a weak prime.

It is an emirp because it is prime and its reverse (1997355011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1105537991 - 2¹⁰ = 1105536967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105537291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552768995 + 552768996.

It is an arithmetic number, because the mean of its divisors is an integer number (552768996).

Almost surely, 2^1105537991 is an apocalyptic number.

1105537991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105537991 is an equidigital number, since it uses as much as digits as its factorization.

1105537991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42525, while the sum is 41.

The square root of 1105537991 is about 33249.6314415664. The cubic root of 1105537991 is about 1034.0095672712.

The spelling of 1105537991 in words is "one billion, one hundred five million, five hundred thirty-seven thousand, nine hundred ninety-one".