1123691 has 2 divisors, whose sum is σ = 1123692. Its totient is φ = 1123690.

The previous prime is 1123669. The next prime is 1123693. The reversal of 1123691 is 1963211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123691 - 2¹⁸ = 861547 is a prime.

Together with 1123693, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1123693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561845 + 561846.

It is an arithmetic number, because the mean of its divisors is an integer number (561846).

2^1123691 is an apocalyptic number.

1123691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123691 is an equidigital number, since it uses as much as digits as its factorization.

1123691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 23.

The square root of 1123691 is about 1060.0429236592. The cubic root of 1123691 is about 103.9638372791.

The spelling of 1123691 in words is "one million, one hundred twenty-three thousand, six hundred ninety-one".