1163891 has 2 divisors, whose sum is σ = 1163892. Its totient is φ = 1163890.

The previous prime is 1163879. The next prime is 1163923. The reversal of 1163891 is 1983611.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1163891 - 2¹⁰ = 1162867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1163821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581945 + 581946.

It is an arithmetic number, because the mean of its divisors is an integer number (581946).

2^1163891 is an apocalyptic number.

1163891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163891 is an equidigital number, since it uses as much as digits as its factorization.

1163891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 1163891 is about 1078.8378005984. The cubic root of 1163891 is about 105.1891074324.

The spelling of 1163891 in words is "one million, one hundred sixty-three thousand, eight hundred ninety-one".