1101691 has 2 divisors, whose sum is σ = 1101692. Its totient is φ = 1101690.

The previous prime is 1101689. The next prime is 1101697. The reversal of 1101691 is 1961011.

1101691 = 426² + 427² + ... + 431².

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101691 - 2¹ = 1101689 is a prime.

Together with 1101689, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1101697) 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, 550845 + 550846.

It is an arithmetic number, because the mean of its divisors is an integer number (550846).

2^1101691 is an apocalyptic number.

1101691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101691 is an equidigital number, since it uses as much as digits as its factorization.

1101691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 1101691 is about 1049.6146912082. The cubic root of 1101691 is about 103.2808809989.

The spelling of 1101691 in words is "one million, one hundred one thousand, six hundred ninety-one".