1061100991 has 2 divisors, whose sum is σ = 1061100992. Its totient is φ = 1061100990.

The previous prime is 1061100983. The next prime is 1061101003. The reversal of 1061100991 is 1990011601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1061100991 - 2³ = 1061100983 is a prime.

It is a super-2 number, since 2×1061100991² = 2251870626202364162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061100941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530550495 + 530550496.

It is an arithmetic number, because the mean of its divisors is an integer number (530550496).

Almost surely, 2^1061100991 is an apocalyptic number.

1061100991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061100991 is an equidigital number, since it uses as much as digits as its factorization.

1061100991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 1061100991 is about 32574.5451388043. The cubic root of 1061100991 is about 1019.9657142775.

The spelling of 1061100991 in words is "one billion, sixty-one million, one hundred thousand, nine hundred ninety-one".