1013891 has 2 divisors, whose sum is σ = 1013892. Its totient is φ = 1013890.

The previous prime is 1013879. The next prime is 1013893. The reversal of 1013891 is 1983101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1013891 - 2⁶ = 1013827 is a prime.

It is a Sophie Germain prime.

Together with 1013893, 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 (1013893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506945 + 506946.

It is an arithmetic number, because the mean of its divisors is an integer number (506946).

2^1013891 is an apocalyptic number.

1013891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013891 is an equidigital number, since it uses as much as digits as its factorization.

1013891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1013891 is about 1006.9215460998. The cubic root of 1013891 is about 100.4609057287.

Adding to 1013891 its reverse (1983101), we get a palindrome (2996992).

The spelling of 1013891 in words is "one million, thirteen thousand, eight hundred ninety-one".